easeweather.com
Kusatsu
AkitaAomoriAsahikawaBeppuChibaEbinaFujiFujikawaguchikoFujinomiyaFujiyoshidaFukuokaFuranoFurukawaGifu-shiHakodateHakoneHakubaHimejiHiroshimaItoshimaIwakuniKagoshimaKamakuraKamakuraKanazawaKaruizawaKobeKochiKumamotoKurashiki
Kusatsu
KyotoKōyasanMaihamaMatsumotoMinakamiNaganoNagasakiNagoyaNahaNakatsugawaNara-shiNiigataNikkōNiseko TownNoboribetsuOkinawaOsakaOtaruSapporoSendaiShibuyaShigaShimizuShimodaShinjukuShirakawaShirakawa-goTakayamaTateyamaTochigiTokyoTokyo Disney LandTokyo Disney ResortTottoriToyamaUrayasuUrayasuWakayamaWakkanaiYamagataYokohamaYufuinYuzawa More Locations
Japan weather

Weather in Kusatsu for September 2025

Your guide to Kusatsu weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Kusatsu has been nearly identical to the historical average, with a temperature of 25.1 °C (showing only a slight deviation of -0.5 °C).

  • The forecast for the next days in Kusatsu predicts a temperature of 18.9 °C, which is cooler than the historical average.

  • In general, the average temperature in Kusatsu at the beginning of September is 26.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.4 °C by the end of September.

    • Rain 🌧️

  • Kusatsu experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 140.7 mm.

    • More

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

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

Average dry days
6
Dry days
Average rainy days
24
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/16°
Temperatures
Average wind speed
8 km/h
Avg max wind
Average humidity
86 %
Avg humidity

Kusatsu Weather September

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

Temperatures trend during September in Kusatsu

See the weather trend as well as the moving average line

September weather in Kusatsu day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 29° /18° 1.6 mm 7
2 Sept. Patchy rain possible
Patchy rain possible
 30° /18° 3.7 mm 7
3 Sept. Light rain shower
Light rain shower
 25° /17° 10.9 mm 6
4 Sept. Patchy rain possible
Patchy rain possible
 22° /15° 3.6 mm 5
5 Sept. Patchy rain possible
Patchy rain possible
 24° /16° 27.7 mm 6
6 Sept. Patchy rain possible
Patchy rain possible
 27° /16° 0 mm 7
7 Sept. Patchy rain possible
Patchy rain possible
 28° /17° 1.9 mm 6
8 Sept. Light rain shower
Light rain shower
 26° /18° 14.4 mm 6
9 Sept. Light rain shower
Light rain shower
 26° /18° 6.7 mm 6
10 Sept. Light rain shower
Light rain shower
 24° /18° 8.5 mm 6
11 Sept. Light rain shower
Light rain shower
 24° /17° 10 mm 6
12 Sept. Light rain shower
Light rain shower
 22° /17° 8.8 mm 5
13 Sept. Light rain shower
Light rain shower
 24° /18° 7.8 mm 6
14 Sept. Moderate rain
Moderate rain
 26° /19° 19 mm 1.6
15 Sept. Moderate rain
Moderate rain
 23° /20° 5.3 mm 1.2
16 Sept. Patchy rain possible
Patchy rain possible
 27° /19° 3.7 mm 1.9
17 Sept. Patchy rain possible
Patchy rain possible
 29° /18° 4.1 mm 1.8
18 Sept. Patchy rain possible
Patchy rain possible
 26° /14° 1.7 mm 1.1
19 Sept. Heavy rain
Heavy rain
 14° /11° 21.4 mm 3
20 Sept. Moderate rain
Moderate rain
 12° /10° 7.6 mm 3
21 Sept. Moderate rain
Moderate rain
 13° /12° 9.4 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 18° /13° 0.3 mm 3
23 Sept. Patchy rain possible
Patchy rain possible
 18° /14° 1 mm 4
24 Sept. Patchy rain possible
Patchy rain possible
 15° /13° 0.6 mm 3
25 Sept. Patchy rain possible
Patchy rain possible
 14° /13° 3.8 mm 3
26 Sept. Moderate rain
Moderate rain
 14° /12° 19.1 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 15° /12° 1.1 mm 3
28 Sept. Light rain shower
Light rain shower
 19° /15° 5.4 mm 4
29 Sept. Light rain shower
Light rain shower
 16° /13° 3.4 mm 4
30 Sept. Fog
Fog
 15° /12° 0.9 mm 4
Next
Important Notice
Our weather forecast for Kusatsu 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 Kusatsu forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Kusatsu weather in September vs August vs October

Compare September weather in Kusatsu 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
Temperatures26°/19°24°/16°16°/10°
Rainfall294 mm141 mm168 mm
Wind7.5 km/h8.4 km/h8.6 km/h
Humidity85%86%85%
Rainy days27 days24 days14 days
Dry days4 days6 days17 days

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

Kusatsu in September - FAQ

What are the expected maximum and minimum temperatures in Kusatsu during September?
During September, expect a variety of temperatures with highs around 24° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Kusatsu during September?
Significant rainfall exceeding 140.7 mm is expected in Kusatsu during September, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Kusatsu during September?
The average wind speed in Kusatsu during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Kusatsu in September?

As you prepare for your trip to Kusatsu 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 Kusatsu, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
    • 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

September rainfall patterns in Kusatsu

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

UV exposure in Kusatsu during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

More Kusatsu weather pages
You are here
Location coordinates Where is Kusatsu?

Get accurate weather forecasts for Kusatsu, located at latitude 36.617 and longitude 138.6. Stay updated with localized weather information tailored for Kusatsu.

Found a mistake?
We appreciate your attention to details. Tell us here.