Kusatsu
September
Weather in Kusatsu for September 2025
Your guide to Kusatsu weather in September - trends and predictions
In general, the average temperature in Kusatsu at the beginning of September is 26 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.6 °C by the end of September.
Kusatsu experiences an exceptionally high level of rainfall in September, with more than 20 rainy days on average.
Is September a good time to visit Kusatsu? check out the best time to travel to Kusatsu page.
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Temperatures
Rain 🌧️
More
6
Dry days
24
Rainy days
0
Snow days
24°/16°
Temperatures
8 km/h
Avg max wind
86 %
Avg humidity
Kusatsu in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  26° | 2 28° | 3 22° | 4 24° | 5 27° | 6 28° | 7 27° |
| 8 24° | 9 24° | 10 25° | 11 27° | 12 26° | 13 27° | 14 25° |
| 15 25° | 16 23° | 17 26° | 18 28° | 19 23° | 20 29° | 21  23° |
| 22 24° | 23 21° | 24  15° | 25  18° | 26 24° | 27 23° | 28 19° |
| 29 16° | 30 15° |
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Temperatures trend during September in Kusatsu
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 26° /18° | 2.2 mm | 6 | |
| 2 Sept. | Patchy rain possible | 28° /18° | 4.9 mm | 6 | |
| 3 Sept. | Light rain shower | 22° /17° | 16.9 mm | 5 | |
| 4 Sept. | Patchy rain possible | 24° /14° | 0.3 mm | 5 | |
| 5 Sept. | Patchy rain possible | 27° /16° | 0.8 mm | 6 | |
| 6 Sept. | Patchy rain possible | 28° /17° | 0.1 mm | 6 | |
| 7 Sept. | Patchy rain possible | 27° /18° | 3.7 mm | 6 | |
| 8 Sept. | Light rain shower | 24° /18° | 21 mm | 5 | |
| 9 Sept. | Light rain shower | 24° /18° | 6.7 mm | 5 | |
| 10 Sept. | Light rain shower | 25° /18° | 8.2 mm | 6 | |
| 11 Sept. | Light rain shower | 27° /18° | 8.9 mm | 6 | |
| 12 Sept. | Light rain shower | 26° /19° | 5.3 mm | 6 | |
| 13 Sept. | Light rain shower | 27° /19° | 13.7 mm | 6 | |
| 14 Sept. | Light rain shower | 25° /18° | 2.2 mm | 6 | |
| 15 Sept. | Light rain shower | 25° /18° | 4 mm | 6 | |
| 16 Sept. | Light rain shower | 23° /18° | 4.9 mm | 5 | |
| 17 Sept. | Light rain shower | 26° /19° | 3.8 mm | 6 | |
| 18 Sept. | Light rain shower | 28° /19° | 5.8 mm | 6 | |
| 19 Sept. | Light rain shower | 23° /18° | 4 mm | 5 | |
| 20 Sept. | Patchy rain possible | 29° /18° | 0.1 mm | 6 | |
| 21 Sept. | Patchy light drizzle | 23° /19° | 1.2 mm | 5 | |
| 22 Sept. | Light rain shower | 24° /15° | 5 mm | 5 | |
| 23 Sept. | Patchy rain possible | 21° /13° | 2.5 mm | 5 | |
| 24 Sept. | Fog | 15° /9° | 0.9 mm | 3 | |
| 25 Sept. | Partly cloudy | 18° /9° | 0 mm | 5 | |
| 26 Sept. | Light rain shower | 24° /15° | 2.1 mm | 5 | |
| 27 Sept. | Light rain shower | 23° /16° | 1.9 mm | 5 | |
| 28 Sept. | Light rain shower | 19° /15° | 5.4 mm | 4 | |
| 29 Sept. | Light rain shower | 16° /13° | 3.4 mm | 4 | |
| 30 Sept. | Fog | 15° /12° | 0.9 mm | 4 | |
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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.
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 140.72 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 ☀️
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