Kitasaku-gun (Karuizawa)
September
Weather in Kitasaku-gun for September 2026
Your guide to Kitasaku-gun weather in September - trends and predictions
In general, the average temperature in Kitasaku-gun at the beginning of September is 24.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.4 °C by the end of September.
Kitasaku-gun experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 129.9 mm.
Is September a good time to visit Kitasaku-gun? check out the best time to travel to Kitasaku-gun page.
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Temperatures
Rain 🌧️
More
6
Dry days
24
Rainy days
0
Snow days
22°/14°
Temperatures
8 km/h
Avg max wind
86 %
Avg humidity
Kitasaku-gun Weather September
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Temperatures trend during September in Kitasaku-gun
See the weather trend as well as the moving average line
September weather in Kitasaku-gun day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Patchy rain possible | 27° /18° | 1.1 mm | 6 | |
| 2 Sept. | Patchy rain possible | 28° /17° | 2.6 mm | 7 | |
| 3 Sept. | Light rain shower | 23° /16° | 11.2 mm | 5 | |
| 4 Sept. | Patchy rain possible | 20° /13° | 3.7 mm | 5 | |
| 5 Sept. | Light rain shower | 22° /14° | 29 mm | 5 | |
| 6 Sept. | Patchy rain possible | 24° /13° | 0.1 mm | 6 | |
| 7 Sept. | Patchy rain possible | 28° /14° | 1.7 mm | 6 | |
| 8 Sept. | Light rain shower | 25° /17° | 13.3 mm | 6 | |
| 9 Sept. | Light rain shower | 25° /17° | 5.8 mm | 6 | |
| 10 Sept. | Light rain shower | 23° /15° | 7.7 mm | 5 | |
| 11 Sept. | Light rain shower | 22° /15° | 10.1 mm | 5 | |
| 12 Sept. | Light rain shower | 21° /15° | 8.9 mm | 5 | |
| 13 Sept. | Light rain shower | 24° /14° | 7.5 mm | 6 | |
| 14 Sept. |  Patchy light drizzle | 25° /16° | 7.6 mm | 6 | |
| 15 Sept. | Light rain shower | 23° /16° | 6.2 mm | 5 | |
| 16 Sept. | Light rain shower | 24° /16° | 3.3 mm | 6 | |
| 17 Sept. | Light rain shower | 29° /15° | 3.9 mm | 6 | |
| 18 Sept. | Light rain shower | 27° /17° | 6.6 mm | 6 | |
| 19 Sept. | Light rain shower | 19° /13° | 2.3 mm | 5 | |
| 20 Sept. | Patchy rain possible | 21° /13° | 2.5 mm | 5 | |
| 21 Sept. | Patchy light drizzle | 20° /13° | 1.6 mm | 5 | |
| 22 Sept. | Light rain shower | 21° /10° | 3 mm | 5 | |
| 23 Sept. | Patchy rain possible | 19° /10° | 0.8 mm | 5 | |
| 24 Sept. |  Fog | 16° /9° | 0.3 mm | 4 | |
| 25 Sept. |  Partly cloudy | 21° /9° | 0 mm | 6 | |
| 26 Sept. | Patchy rain possible | 23° /14° | 1.3 mm | 5 | |
| 27 Sept. | Light rain shower | 21° /12° | 0.7 mm | 6 | |
| 28 Sept. | Light rain shower | 20° /11° | 2.4 mm | 5 | |
| 29 Sept. | Light rain shower | 19° /12° | 2.9 mm | 5 | |
| 30 Sept. | Fog | 16° /11° | 1 mm | 4 | |
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Important Notice
Our weather forecast for Kitasaku-gun 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 Kitasaku-gun forecast closer to your planned date for the most up-to-date weather information.
Change Month
Kitasaku-gun weather in September vs August vs October
Compare September weather in Kitasaku-gun with the previous and following months. See how temperature, rainfall, wind, and other conditions change throughout the year to help you plan your visit.
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 25°/17° | 22°/14° | 17°/9° |
| Rainfall | 286 mm | 130 mm | 176 mm |
| Wind | 7.1 km/h | 8.1 km/h | 8.6 km/h |
| Humidity | 86% | 86% | 86% |
| Rainy days | 26 days | 24 days | 13 days |
| Dry days | 5 days | 6 days | 18 days |
Planning a trip to Kitasaku-gun? Discover the best time to visit
Kitasaku-gun in September - FAQ
What are the expected maximum and minimum temperatures in Kitasaku-gun during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Kitasaku-gun during September?
Significant rainfall exceeding 129.9 mm is expected in Kitasaku-gun during September, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Kitasaku-gun during September?
The average wind speed in Kitasaku-gun during September is 8 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Kitasaku-gun in September?
As you prepare for your trip to Kitasaku-gun 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 Kitasaku-gun, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long 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
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
September rainfall patterns in Kitasaku-gun
Explore the daily rainfall trends and prepare for Kitasaku-guns September weather 💧
UV exposure in Kitasaku-gun during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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