Osaka City Hits 30 –Latest "Midsummer Day" on Record; Tokyo and Nagoya May Follow

2026/10/21 12:23

Today, Wednesday the 21st, some areas along the Pacific coast of Western and Eastern Japan are experiencing unseasonably hot weather. In Osaka City, temperatures reached 30 before 10:00 a.m., marking the latest date on record for a "midsummer day" (a day with a high of 30or higher).



A low-pressure system accompanied by a front is currently moving eastward across the Sea of ??Japan, drawing warm air from the south toward the system and its associated front.

Regions along the Pacific coast of Western and Eastern Japan are covered by a warm air mass?with temperatures reaching 18 ??at an altitude of approximately 1,500 meters?reminiscent of conditions typically seen between late August and early September. In areas where the sun is shining, temperatures have been rising since the morning. In Osaka City, a temperature of 30.0 was recorded at 9:45 a.m., climbing further to 30.8 by 11:09 a.m.?the latest date for a midsummer day on record. The temperature in Osaka is expected to reach as high as 32.

Meanwhile, in central Tokyo, temperatures have already surpassed 29, reaching 29.8 by 11:00 a.m.?just shy of the 30 threshold. Temperatures may continue to rise into the early afternoon, with a daily high of 30 currently forecast. Should it reach 30, this would also set a record for the latest midsummer day. Additionally, temperatures in Nagoya City are expected to climb as high as 31.




The unseasonably warm weather?unusual for late October?increases the risk of heatstroke, so please exercise caution if you are spending time outdoors.
Be sure to stay hydrated by drinking fluids regularly.

Weekly weather: Expect frequent cloudy or rainy days across many regions; keep an eye on the path of Typhoon 30.

2026/10/21 08:52

Looking ahead, the area around Honshu is likely to be affected by weather fronts, leading to frequent cloudy or rainy days. Please also keep a close watch on the future path of Typhoon No. 30.



Tomorrow, Tuesday the 22nd, the region around Honshu will be under the influence of a high-pressure system. Conditions in Western and Eastern Japan are expected to improve, with many areas seeing clear skies.
In Northern Japan, due to a strong cold air mass in the upper atmosphere, snow is expected at higher elevations in Hokkaido and the northern part of the Tohoku region, with the potential for snow accumulation. If you are driving through mountainous areas?such as over mountain passes?please pay close attention to road conditions and check for the latest traffic information. In the low-lying areas of the Tohoku region and in Niigata Prefecture, cold rain may fall until around dawn.



As of 6:00 a.m. today, Wednesday the 21st, the large and violent Typhoon No. 30 is moving northwest over the ocean east of the Philippines.
Caution is advised for the Sakishima Islands, where high, swell-driven waves?potentially reaching warning-level intensity?are expected starting tonight. Similar conditions are anticipated for the main island of Okinawa beginning tomorrow, the 22nd.
Typhoon No. 30 is expected to make its closest approach to the Sakishima Islands around the 24th. While it is forecast to gradually lose some of its strength as it continues moving northwest, it is still expected to be a powerful storm?with maximum sustained winds of 40 m/s near its center?when it approaches. Okinawa can expect severe weather conditions between the 23rd and 25th. Please remain on alert for hazards such as violent winds, high waves, heavy rain, and rising sea levels caused by storm surges.





A weather front is expected to become stationary near the main island of Honshu. Warm, moist air from Typhoon No. 30 will flow toward this front, leading to frequent cloudy and rainy weather across western and eastern Japan.
Furthermore, the projected path for Typhoon No. 30 indicates a gradual shift toward the northeast from Sunday, the 25th, onwards. As it approaches the vicinity of Honshu, there is a possibility of heavy rainfall across a wide area of ??western and eastern Japan. Please stay tuned for the latest typhoon updates as they become available.

[Typhoon Update] Large and violent Typhoon No. 30 is approaching the Sakishima Islands; Okinawa should be on high alert for severe storms, high waves, and storm surges this weekend.

2026/10/21 07:56

As of 6:00 a.m. today, Wednesday the 21st, Typhoon No. 30 (Champa)?a large and extremely powerful storm?is moving west-northwest east of the Philippines at a speed of 25 km/h.

Typhoon No. 30 ? Wednesday, the 21st, 6:00 a.m.
---------------------------------
Center Location: East of the Philippines
Size: Large
Intensity: Extremely powerful
Movement: West-northwest at 25 km/h
Central Pressure: 900 hPa
Maximum Sustained Wind Speed: 60 m/s (near the center)
Maximum Instantaneous Wind Speed: 85 m/s
---------------------------------



Outlook
The typhoon is expected to move northwest, passing south of Okinawa. It is projected to approach the Sakishima Islands between Friday the 23rd and Saturday the 24th while remaining extremely powerful.

In the Okinawa region, the pressure gradient between a high-pressure system over the continent and the typhoon will increase, leading to stronger winds starting Thursday the 22nd. The Sakishima Islands are expected to experience violent, potentially extreme, winds between Friday the 23rd and Saturday the 24th. Residents in the Okinawa main island region and the Daito Islands region should also exercise caution regarding strong winds. In the Sakishima Islands, extremely rough sea conditions are expected from Friday the 23rd through Saturday the 24th. In the Okinawa main island region and the Daito Islands region, there is also a risk of very rough seas from Wednesday the 21st (the day after tomorrow) through Friday the 23rd, depending on the typhoon's path.
Furthermore, the Sakishima Islands are expected to experience heavy, warning-level rainfall from Friday the 23rd through Saturday the 24th. Please remain on alert for landslides, flooding in low-lying areas, and rising water levels or overflowing of rivers.

Subsequent Path
While there is a high degree of uncertainty regarding its future course, the typhoon is expected to turn eastward over the East China Sea around Sunday the 25th and move toward the vicinity of the Tsushima Strait.
According to the latest forecasts, the typhoon is tracking further east than previously predicted, increasing the likelihood that it will approach the Sea of ??Japan side of the Japanese archipelago.
Please continue to check for the latest typhoon information.

Weather forecast for today, Wednesday the 21st: Rain expected, mainly along the Sea of ​​Japan side from northern to western Japan; unseasonably muggy conditions on the Pacific side.

2026/10/21 06:44

Today, Wednesday the 21st, a stationary front lies across the main island of Honshu, with a low-pressure system moving along it toward northern Japan. This low-pressure system is expected to intensify rapidly as it travels toward the Sea of ??Okhotsk through tomorrow.




South of the front, warm, humid southerly winds are blowing toward the front and the low-pressure system. Across the Pacific-facing regions from western to eastern Japan, it will be more humid and sweltering than yesterday. In some areas, temperatures may reach 30 C or higher?a "midsummer-like" day?potentially setting records for the latest such occurrence since data collection began. Please take appropriate precautions against the heat, such as staying well-hydrated.



By tonight, a pressure pattern characterized by higher pressure to the west and lower pressure to the east will temporarily develop.
Cold air from the north will flow in, leading to significant temperature fluctuations between day and night. In particular, snow is expected in the mountainous areas of Hokkaido, with some locations likely seeing an accumulation of snow by tomorrow.

Across Honshu, rain is expected over a wide area along the Sea of ??Japan coast. In regions such as Tohoku, Hokuriku, and San'in, rainfall may intensify locally, accompanied by thunderstorms. Strong winds will also cause rain to fall sideways; please remain vigilant not only regarding the rainfall itself but also concerning strong winds and high waves along the coast.
Severe weather, including lightning strikes and tornadoes or other intense gusts, may occur. If you notice signs such as the sound of thunder, please take steps to ensure your safety?for example, by seeking shelter inside a sturdy building.



From around midday through the evening, rain is expected in parts of the Tokai, Kinki, and Chugoku regions, and by nightfall, rain may also reach the Kanto region. In areas along the Pacific coast, southerly winds will strengthen; please be cautious of these strong winds, and remain highly alert to the risk of high waves in coastal areas.

Latest 3-month forecast: Temperatures nationwide to be higher than average; the progression of the seasons will be slow.

2026/10/20 22:29

On Tuesday the 20th, the Japan Meteorological Agency (JMA) released its latest three-month weather forecast, outlining expected conditions for the coming three months.



An El Ni?o event?projected to be the strongest on record?is expected to persist through the winter. Sea surface temperatures are forecast to be higher than average across the eastern to central equatorial Pacific and the Indian Ocean, which will likely lead to an increase in the formation of cumulonimbus clouds in these regions. Conversely, fewer cumulonimbus clouds are expected to form near the Philippines.

As a result, the westerly jet stream in the upper atmosphere is likely to flow further south than usual?particularly over the Eurasian continent?and will also track slightly further south and remain relatively weak in the vicinity of Japan. While the Siberian High is expected to be near its typical seasonal strength, the Aleutian Low is projected to be weaker on its western side, leading to weaker seasonal winds around Japan.

Furthermore, due to the combined effects of global warming and the El Ni?o phenomenon, temperatures throughout the atmosphere?especially in the tropics?are expected to be higher than normal. Consequently, Japan is likely to see less impact from cold air masses.

With high-pressure systems tending to develop near the Philippines, warm, moist air from the south will likely flow toward Japan. This will make regions such as the Pacific-facing areas of Northern and Eastern Japan, Western Japan, and the Okinawa/Amami islands more susceptible to the influence of low-pressure systems.



The outlook for the next three months suggests that the entire country will experience minimal impact from cold air, with temperatures expected to remain higher than average. Over the next three months, temperatures in Western and Eastern Japan are expected to be higher than average, while in Northern Japan, they will likely be near or above average; the transition between seasons is expected to be gradual.



Due to the influence of low-pressure systems, precipitation is expected to be above average along the Pacific side of Japan, in Western Japan, and in the Okinawa-Amami region; along the Pacific side of Northern Japan, it is expected to be near or above average. Snowfall along the Sea of ??Japan side of Northern Japan is likely to be near or below average.
From November through December, the influence of low-pressure systems is expected to result in more cloudy or rainy days than usual across the Sea of ??Japan side of Western Japan and the Okinawa-Amami region. Along the Sea of ??Japan side of Northern Japan, there will likely be many days of clouds, rain, or snow, consistent with typical seasonal patterns.
This weather pattern is expected to continue into January, though the Pacific side of Northern Japan will likely see many sunny days, as is typical for that region.



*El Ni?o Phenomenon
A phenomenon in which sea surface temperatures in the equatorial Pacific remain higher than average. It influences global weather patterns and is statistically associated with a tendency for "warm winters and cool summers" in the vicinity of Japan.

Furthermore, in an "El Ni?o Monitoring Bulletin" released by the Japan Meteorological Agency on the 9th of this month, it was noted that sea surface temperatures in the El Ni?o monitoring region reached their highest recorded levels in September. The bulletin forecasts that these temperatures will remain above the baseline through the winter, eventually reaching their peak.

Typhoon 30 approaching; Okinawa region warned of violent winds, high waves, and storm surges

2026/10/20 18:18

As of 3:00 PM today, Tuesday the 20th, the large and very strong Typhoon No. 30 is moving west-northwest east of the Philippines. Satellite imagery shows a distinct eye near its center.



Typhoon No. 30 is expected to continue moving west-northwest while maintaining its intensity, and is projected to approach the Sakishima Islands?still as a very strong storm?between Friday the 23rd and Saturday the 24th. In the Okinawa region, winds will gradually begin to strengthen starting tomorrow, Wednesday the 21st; the Sakishima Islands, in particular, are expected to experience violent winds between Friday the 23rd and Saturday the 24th. Please take typhoon preparedness measures early, before the winds intensify.

Wind Forecast
Expected maximum wind speeds (maximum instantaneous wind speeds) for the 21st:
Okinawa Main Island region: 15 m/s (25 m/s)
Miyakojima region: 18 m/s (30 m/s)
Yaeyama region: 18 m/s (30 m/s)

Expected maximum wind speeds (maximum instantaneous wind speeds) for the 22nd:
Okinawa Main Island region: 17 m/s (30 m/s)
Miyakojima region: 23 m/s (35 m/s)
Yaeyama region: 23 m/s (35 m/s)
Daitojima region: 15 m/s (25 m/s)

Due to the typhoon, coastal waters will experience swells. Conditions are expected to become very rough?starting tomorrow, Wednesday the 21st, in the Sakishima Islands, and from Thursday the 22nd in the Okinawa Main Island and Daitojima regions. Please remain on alert for high waves accompanied by swells. Furthermore, depending on the typhoon's path, there is a risk of warning-level storm surges in the Sakishima Islands between Friday the 23rd and Saturday the 24th.



In the Okinawa region, the atmosphere will become unstable due to the influx of warm, moist air circulating around the typhoon. Please be cautious of lightning strikes and sudden, heavy rainfall tomorrow, Wednesday the 21st, and the day after, Thursday the 22nd. In particular, on Thursday the 22nd, please remain alert and take precautions against flooding in low-lying areas and rising water levels in rivers.

Weather for tomorrow, Tuesday the 20th: Northern Japan faces risk of heavy rain

2026/10/20 13:53

As of 11:00 a.m. today, Tuesday the 20th, a stationary front extends from off the coast of Sanriku to the waters west of Kyushu, bringing rain to areas stretching from the Tohoku region to the Hokuriku region.





This front is expected to remain stationary across eastern and western Japan throughout today, Tuesday the 20th. A low-pressure system is forecast to form along the front near Jeju Island tonight, which will likely affect the Japanese archipelago through tomorrow, Wednesday the 21st.

The low-pressure system is expected to intensify as it moves northeast across the Sea of ??Japan, passing over northern Japan and reaching the Sea of ??Okhotsk by the evening of tomorrow, Wednesday the 21st. Consequently, the area experiencing rain in northern Japan is expected to expand gradually from the Tohoku region toward Hokkaido. In the Hokuriku region and along the Sea of ??Japan side of the Tohoku region, caution is advised regarding heavy rain, strong winds, and lightning strikes throughout the day. In Hokkaido, please also be mindful of strong winds and lightning strikes from the afternoon onwards.

Western and eastern Japan will also see rain or cloudy skies, with a risk of thunderstorms and sudden, heavy downpours. In the Kanto region, while some areas may see sunny intervals from morning through evening, rain is expected in some places by nighttime.



Meanwhile, a very strong Typhoon No. 30 is moving west-northwest, east of the Philippines. It may approach the Nansei Islands, where winds are expected to strengthen starting tomorrow evening, Wednesday the 21st. Please exercise great caution regarding strong winds.

Be alert for heavy rain and thunderstorms across eastern and western Japan this afternoon, Tuesday the 20th.

2026/10/20 12:01

Today, Tuesday the 20th, a low-pressure system accompanied by a front is located east of the Kuril Islands and is moving eastward. A front extending from this system is reaching toward eastern and western Japan and is expected to remain nearly stationary.
As warm, moist air flows toward this front, atmospheric conditions across eastern and western Japan will become highly unstable.
Please be cautious of sudden heavy rainfall, lightning strikes, and violent gusts such as those associated with tornadoes.



Currently, rain is falling in parts of the Tohoku and Hokuriku regions, as well as along the Pacific coast from the Kanto to the Kinki regions-an area where moist air is flowing in from the sea around the periphery of a high-pressure system.

This morning, 58.5 mm of heavy rain was recorded in one hour-up until 3:08 AM-in Nishikawa, Kozagawa Town, Higashimuro District, Wakayama Prefecture.



Moving forward, rain in the Tohoku, Hokuriku, and Koshin regions is expected to continue in many areas until this evening. In the Kanto, Chugoku, and Shikoku regions, rain is likely to persist in some places until tonight.
Even in areas across eastern and western Japan where it is not currently raining, it is advisable to carry rain gear if you are heading out.

Furthermore, some areas may experience localized, intense rainfall accompanied by thunderstorms. Please remain alert for lightning strikes and violent gusts, such as those caused by tornadoes.

If you notice signs that a well-developed cumulonimbus cloud is approaching-such as the arrival of dark, black clouds or the sound of thunder-please take steps to ensure your safety, for example by moving indoors.

Weather for tomorrow, Tuesday the 20th: Caution advised for heavy rain in the Hokuriku region

2026/10/20 10:16

As of 11:00 a.m. today, Monday the 19th, a low-pressure system is located over the sea west of Hokkaido and is moving east-northeast. A front extending from this system is bringing rain, primarily to the Tohoku region. Meanwhile, in Shikoku, moist air is being channeled in by easterly winds circulating around a high-pressure system, resulting in heavy, localized rainfall accompanied by thunderstorms.





Although the low-pressure system will move away from Hokkaido by the evening of Monday the 19th, a front is expected to remain stalled across western and eastern Japan through tomorrow, Tuesday the 20th.
Tomorrow, while Hokkaido and the Southwestern Islands will see generally clear skies, a broad area?stretching from the southern part of the Tohoku region through western Japan?will experience rain. Near the front, some areas may see heavy downpours accompanied by thunderstorms.
Cloud cover will also spread across the northern part of the Tohoku region and the Kanto region, with rain in some places; in Kyushu, it will be mostly cloudy, with rain likely in some areas, particularly in the northern part. In western Japan, please be cautious of lightning strikes through tomorrow evening.



In the Hokuriku region in particular, atmospheric conditions will become highly unstable due to the influence of a weather front and the influx of warm, moist air. This is expected to bring heavy, thundery downpours to some areas. Should rain clouds stall or develop more intensely than currently forecast, there is a risk of heavy rainfall reaching a level that would trigger official weather warnings; please stay updated with the latest information. Furthermore, through late tomorrow night, there is a risk of lightning strikes, sudden gusts of wind, and hail?please take appropriate precautions to protect agricultural crops and facilities.

Rain to spread as a front moves south; widespread unstable weather expected on Tuesday the 20th.

2026/10/19 19:33

A low-pressure system accompanied by a front is located north of Hokkaido and is moving east-northeast.
Meanwhile, a high-pressure system is situated east of Japan and is moving toward the southeast.

Due to the front extending from the low-pressure system and moist air circulating around the edge of the high-pressure system, rain is falling in parts of the Tohoku, Hokuriku, Chugoku, and Shikoku regions.



From this evening, Monday the 19th, through tomorrow morning, Tuesday the 20th, the front is expected to gradually shift southward, causing the area affected by rain to expand across Eastern Japan, the Kinki region, the Chugoku region, and the Shikoku region.



Tomorrow, Tuesday the 20th, the front will remain nearly stationary near Honshu, leading to a high likelihood of rain across the Tohoku, Chugoku, and Shikoku regions.
Atmospheric conditions will become highly unstable; please be cautious of lightning, sudden gusts of wind, and intense, localized downpours.

The weather is expected to remain changeable over the coming week.
From Wednesday the 21st through Thursday the 22nd, the influence of the front near Honshu is expected to bring rain to a wide area.
In Okinawa, please also remain on alert for high waves caused by the approach of Typhoon No. 30.

" From the latter part of the week?Saturday the 24th onwards?there is a risk that a weather front will once again stall. Unsettled weather is likely to persist across Western Japan.
Please stay updated with the latest information.