Weather in Nagano for September 2027
In general, the average temperature in Nagano at the beginning of September is 25.9 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 23.1 °C by the end of September.
Nagano in September brings notable rainfall, with an average of 19 rainy days and a total precipitation of 232.1 mm.
Is September a good time to visit Nagano? check out the best time to travel to Nagano page.
✨ Is September a good time to visit Nagano? – Ask the AI Weatherman
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Nagano Weather September
What’s the Weather Like in Nagano This September?
Temperatures trend during September in Nagano
September weather in Nagano day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain | 28° /16° | 6 mm | 6 | |
| 2 Sept. |  Moderate rain | 26° /17° | 10.4 mm | 5 | |
| 3 Sept. | Moderate rain | 26° /15° | 12 mm | 5 | |
| 4 Sept. |  Moderate or heavy rain shower | 25° /15° | 9.6 mm | 5 | |
| 5 Sept. | Moderate rain | 26° /16° | 15.9 mm | 6 | |
| 6 Sept. | Moderate or heavy rain shower | 26° /15° | 7 mm | 5 | |
| 7 Sept. | Light rain | 26° /14° | 5.8 mm | 5 | |
| 8 Sept. |  Heavy rain | 23° /16° | 27 mm | 5 | |
| 9 Sept. | Moderate rain | 27° /15° | 14.3 mm | 5 | |
| 10 Sept. | Light rain | 27° /16° | 4.6 mm | 6 | |
| 11 Sept. | Moderate or heavy rain shower | 26° /16° | 7.3 mm | 6 | |
| 12 Sept. |  Patchy rain possible | 27° /16° | 2.3 mm | 6 | |
| 13 Sept. | Light rain | 27° /16° | 3.8 mm | 6 | |
| 14 Sept. | Light rain | 28° /16° | 4.6 mm | 6 | |
| 15 Sept. | Light rain | 26° /17° | 3.5 mm | 5 | |
| 16 Sept. | Light rain | 26° /15° | 5.4 mm | 5 | |
| 17 Sept. | Light rain | 27° /16° | 4 mm | 6 | |
| 18 Sept. | Moderate rain | 27° /15° | 13.4 mm | 6 | |
| 19 Sept. | Light rain | 25° /15° | 3.8 mm | 5 | |
| 20 Sept. | Moderate rain | 24° /14° | 16 mm | 5 | |
| 21 Sept. | Light rain | 22° /14° | 4.7 mm | 5 | |
| 22 Sept. | Moderate rain | 22° /12° | 12.2 mm | 5 | |
| 23 Sept. | Light rain | 22° /11° | 9.2 mm | 5 | |
| 24 Sept. | Light rain | 22° /11° | 4.9 mm | 5 | |
| 25 Sept. |  Partly cloudy | 24° /11° | 0.2 mm | 5 | |
| 26 Sept. | Light rain | 23° /12° | 4.5 mm | 5 | |
| 27 Sept. | Light rain | 23° /12° | 5.3 mm | 5 | |
| 28 Sept. | Light rain | 23° /12° | 9.1 mm | 5 | |
| 29 Sept. | Light rain | 23° /11° | 4.8 mm | 5 | |
| 30 Sept. | Patchy rain possible | 24° /11° | 0.6 mm | 6 | |
| Next | |||||
Nagano weather in September vs August vs October
| August | September | October | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 29°/18° | 25°/14° | 18°/7° |
| Rainfall | 240 mm | 232 mm | 146 mm |
| Wind | 8.8 km/h | 8.3 km/h | 9.1 km/h |
| Humidity | 83% | 85% | 81% |
| Rainy days | 23 days | 19 days | 14 days |
| Dry days | 8 days | 11 days | 17 days |
Planning a trip to Nagano? Discover the best time to visit
Nagano in September - FAQ
What are the expected maximum and minimum temperatures in Nagano during September?
How much rainfall should be expected in Nagano during September?
What are the typical wind conditions in Nagano during September?
September rainfall patterns in Nagano
UV exposure in Nagano during September
What to pack to Nagano in September?
Mild & changeable · highs around 25 °C, frequent showers
As you prepare for your trip to Nagano 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 Nagano, during September, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
👟 Footwear
🎒 Accessories
Where is Nagano?Get accurate weather forecasts for Nagano, located at latitude 36.65 and longitude 138.183. Stay updated with localized weather information tailored for Nagano.