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Japan weather
Japan (Tokyo)
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Japan weather

Weather in Japan for September 2025

Your guide to Japan weather in September - trends and predictions

    Temperatures

  • So far, September 2025 in Japan is slightly warmer than the historical average by 0.6 °C.

  • The forecast for the next days in Japan predicts temperatures to be around 25 °C, close to the historical average.

  • In general, the average temperature in Japan at the beginning of September is 28.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.9 °C by the end of September.

    • Rain 🌧️

  • Japan experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 180.5 mm.

    • More

  • Is September a good time to visit Japan? check out the best time to travel to Japan page.

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
7
Dry days
Average rainy days
23
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/23°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
68 %
Avg humidity

Japan Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
30°
2
Moderate or heavy rain shower
29°
3
Moderate or heavy rain shower
29°
4
Light rain shower
27°
5
Partly cloudy
28°
6
Patchy rain possible
29°
7
Partly cloudy
30°
8
Moderate or heavy rain shower
28°
9
Patchy rain possible
29°
10
Partly cloudy
30°
11
Light rain shower
29°
12
Partly cloudy
29°
13
Patchy rain possible
30°
14
Patchy rain possible
30°
15
Overcast
29°
16
Patchy rain possible
29°
17
Patchy rain possible
29°
18
Moderate rain
33°
19
Moderate rain
25°
20
Patchy rain possible
23°
21
Patchy rain possible
24°
22
Patchy rain possible
21°
23
Partly cloudy
26°
24
Partly cloudy
25°
25
Moderate rain
21°
26
Patchy rain possible
23°
27
Patchy rain possible
25°
28
Partly cloudy
30°
29
Patchy rain possible
23°
30
Moderate rain
20°

What’s the Weather Like in Japan This September?

Discover the average temperatures and weather trends across Japan’s cities this September.
Patchy rain possibleTokyo28 °C / 23 °CPatchy rain possibleOsaka29 °C / 22 °CPatchy rain possibleKyoto28 °C / 21 °CPatchy rain possibleSapporo21 °C / 13 °CPatchy rain possibleFujikawaguchiko23 °C / 15 °CPatchy rain possibleNagoya29 °C / 22 °CPatchy rain possibleTakayama24 °C / 14 °CPatchy rain possibleFukuoka28 °C / 21 °CPatchy rain possibleHiroshima27 °C / 20 °CPatchy rain possibleFuji25 °C / 18 °CPatchy rain possibleNagano26 °C / 14 °CPatchy rain possibleKanazawa26 °C / 20 °CMore Locations

Temperatures trend during September in Japan

See the weather trend as well as the moving average line

September weather in Japan day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Sunny
Sunny
 30° /25° 2.9 mm 7
2 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /24° 11.4 mm 7
3 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /23° 11.1 mm 6
4 Sept. Light rain shower
Light rain shower
 27° /22° 20.7 mm 6
5 Sept. Partly cloudy
Partly cloudy
 28° /23° 16.5 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 29° /24° 0.4 mm 6
7 Sept. Partly cloudy
Partly cloudy
 30° /23° 2.5 mm 7
8 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /23° 31.6 mm 6
9 Sept. Patchy rain possible
Patchy rain possible
 29° /23° 12 mm 6
10 Sept. Partly cloudy
Partly cloudy
 30° /24° 3 mm 7
11 Sept. Light rain shower
Light rain shower
 29° /23° 2.1 mm 6
12 Sept. Partly cloudy
Partly cloudy
 29° /23° 4.1 mm 7
13 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 0.3 mm 7
14 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 0.8 mm 7
15 Sept. Overcast
Overcast
 29° /24° 1.5 mm 7
16 Sept. Patchy rain possible
Patchy rain possible
 29° /23° 3.2 mm 6
17 Sept. Patchy rain possible
Patchy rain possible
 29° /23° 0.6 mm 7
18 Sept. Moderate rain
Moderate rain
 33° /24° 10.1 mm 1.6
19 Sept. Moderate rain
Moderate rain
 25° /22° 10.7 mm 0.2
20 Sept. Patchy rain possible
Patchy rain possible
 23° /22° 1.7 mm 0.2
21 Sept. Patchy rain possible
Patchy rain possible
 24° /22° 0.7 mm 1.3
22 Sept. Patchy rain possible
Patchy rain possible
 21° /20° 0.9 mm 5
23 Sept. Partly cloudy
Partly cloudy
 26° /20° 0.1 mm 6
24 Sept. Partly cloudy
Partly cloudy
 25° /20° 0.1 mm 6
25 Sept. Moderate rain
Moderate rain
 21° /20° 10.6 mm 5
26 Sept. Patchy rain possible
Patchy rain possible
 23° /20° 1.7 mm 5
27 Sept. Patchy rain possible
Patchy rain possible
 25° /22° 0.2 mm 5
28 Sept. Partly cloudy
Partly cloudy
 30° /23° 0 mm 7
29 Sept. Patchy rain possible
Patchy rain possible
 23° /21° 2.8 mm 5
30 Sept. Moderate rain
Moderate rain
 20° /18° 8.8 mm 4
Next
Important Notice
Our weather forecast for Japan in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Japan forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Japan weather in September vs August vs October

Compare September weather in Japan with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
AugustSeptemberOctober
WeatherPatchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Patchy rain possible
Temperatures31°/26°28°/23°22°/16°
Rainfall186 mm180 mm147 mm
Wind23 km/h22 km/h21.7 km/h
Humidity68%68%60%
Rainy days24 days23 days24 days
Dry days7 days7 days7 days

Planning a trip to Japan? Discover the best time to visit

Guide for Japan in September

In September, Japan experiences a transition from summer to autumn, resulting in varied weather conditions across the country. At the beginning of the month, the northern regions such as Hokkaido may still have remnants of summer with temperatures around 20° and occasional rainfall.

In contrast, central areas like Tokyo and Kyoto can expect milder temperatures around 25° with decreasing humidity, making it a pleasant time for outdoor activities and sightseeing.

Moving towards the end of September, the weather in Japan begins to cool down further. In Hokkaido, temperatures may drop to around 15° as autumn sets in, creating picturesque landscapes with the changing colors of the leaves.

In central regions, the temperatures continue to decrease to around 22°, and the skies become clearer, providing comfortable conditions for exploring the cultural and historical attractions.

Overall, September in Japan offers a transition from the warmth of summer to the crispness of autumn, making it an ideal time to experience the country's natural beauty and cultural richness.

Japan in September - FAQ

Is September a good time to visit Japan?
You can travel to Japan in September, but there are probably better months doing so, read more about the best time to visit Japan
What are the expected maximum and minimum temperatures in Japan during September?
During September, expect a variety of temperatures with highs around 28° and lows near 23°, suitable for diverse activities and preferences.
How much rainfall should be expected in Japan during September?
Significant rainfall exceeding 180.5 mm is expected in Japan during September, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Japan during September?
The average wind speed in Japan during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Japan in September?

As you prepare for your trip to Japan in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Japan, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips

September rainfall patterns in Japan

Explore the daily rainfall trends and prepare for Japans September weather 💧

UV exposure in Japan during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Regions in Japan
Choose a region for an accurate weather forecasts
AichiAkitaAomoriChibaFukuokaFukushimaGifuGunmaHiroshimaHokkaidoHyōgoIshikawaKagoshimaKanagawaKochiKumamotoKyotoMiyagiNaganoNagasakiNaraNiigataOitaOkayamaOkinawaShizuokaTochigiTokyoTottoriToyamaWakayamaYamagataYamaguchiYamanashiŌsaka
Top locations in Japan
Select a location for an accurate weather forecast
AsahikawaFujiFujikawaguchikoFukuokaHakodateHakoneHiroshimaKanazawaKobeKyotoNaganoNagoyaNara-shiOsakaOtaruSapporoShirakawaShirakawa-goTakayamaTokyo
More Locations

Quick links

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Location coordinates Where is Japan?

Get accurate weather forecasts for Japan, located at latitude 35.69 and longitude 139.692. Stay updated with localized weather information tailored for Japan.

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