Nagano
August
Weather in Nagano for August 2025
Your guide to Nagano weather in August - trends and predictions
In general, the average temperature in Nagano at the beginning of August is 30.9 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 30.4 °C by the end of August.
Nagano experiences an exceptionally high level of rainfall in August, with more than 24 rainy days on average.
Is August a good time to visit Nagano? check out the best time to travel to Nagano page.
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5
Dry days
26
Rainy days
0
Snow days
31°/18°
Temperatures
9 km/h
Avg max wind
81 %
Avg humidity
Nagano in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  31° | 2 33° | 3  33° | ||||
| 4 32° | 5 30° | 6 29° | 7 28° | 8 28° | 9 31° | 10 29° |
| 11 31° | 12 29° | 13 30° | 14 31° | 15 30° | 16 30° | 17 30° |
| 18 30° | 19  31° | 20 30° | 21  31° | 22 32° | 23  33° | 24 31° |
| 25 30° | 26 32° | 27 31° | 28 29° | 29 29° | 30 30° | 31  32° |
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Temperatures trend during August in Nagano
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Sunny | 31° /16° | 0 mm | 8 | |
| 2 Aug. | Sunny | 33° /17° | 0 mm | 8 | |
| 3 Aug. | Patchy rain possible | 33° /20° | 0.7 mm | 7 | |
| 4 Aug. | Light rain shower | 32° /18° | 8.5 mm | 7 | |
| 5 Aug. | Light rain shower | 30° /20° | 11.3 mm | 7 | |
| 6 Aug. | Light rain shower | 29° /18° | 12.9 mm | 6 | |
| 7 Aug. | Light rain shower | 28° /17° | 7.6 mm | 6 | |
| 8 Aug. | Light rain shower | 28° /18° | 4 mm | 6 | |
| 9 Aug. | Patchy rain possible | 31° /15° | 1.3 mm | 7 | |
| 10 Aug. | Patchy rain possible | 29° /13° | 0.1 mm | 6 | |
| 11 Aug. | Patchy rain possible | 31° /19° | 0.1 mm | 7 | |
| 12 Aug. | Light rain shower | 29° /18° | 3.9 mm | 6 | |
| 13 Aug. | Light rain shower | 30° /20° | 9.7 mm | 6 | |
| 14 Aug. | Light rain shower | 31° /19° | 16.2 mm | 7 | |
| 15 Aug. | Light rain shower | 30° /18° | 10 mm | 7 | |
| 16 Aug. | Patchy rain possible | 30° /20° | 2.3 mm | 7 | |
| 17 Aug. | Patchy rain possible | 30° /20° | 0.3 mm | 7 | |
| 18 Aug. | Patchy rain possible | 30° /18° | 2.2 mm | 7 | |
| 19 Aug. | Patchy light rain with thunder | 31° /17° | 6.9 mm | 7 | |
| 20 Aug. | Light rain shower | 30° /15° | 3 mm | 7 | |
| 21 Aug. | Moderate or heavy rain shower | 31° /20° | 5.4 mm | 7 | |
| 22 Aug. | Patchy rain possible | 32° /20° | 2.4 mm | 7 | |
| 23 Aug. | Heavy rain at times | 33° /20° | 3.8 mm | 7 | |
| 24 Aug. | Moderate or heavy rain shower | 31° /18° | 18.7 mm | 7 | |
| 25 Aug. | Patchy light rain with thunder | 30° /17° | 9.1 mm | 7 | |
| 26 Aug. | Patchy rain possible | 32° /18° | 7.4 mm | 7 | |
| 27 Aug. | Patchy rain possible | 31° /18° | 6.3 mm | 7 | |
| 28 Aug. | Patchy rain possible | 29° /17° | 8.8 mm | 6 | |
| 29 Aug. | Patchy rain possible | 29° /16° | 9.2 mm | 6 | |
| 30 Aug. | Patchy rain possible | 30° /16° | 6 mm | 7 | |
| 31 Aug. | Partly cloudy | 32° /17° | 0.9 mm | 7 | |
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Important Notice
Our weather forecast for Nagano in August 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 Nagano forecast closer to your planned date for the most up-to-date weather information.
Nagano in August - FAQ
What are the expected maximum and minimum temperatures in Nagano during August?
Expect warm days with temperatures around 31°, cooling to mild conditions of 18° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Nagano during August?
Significant rainfall exceeding 160.9 mm is expected in Nagano during August, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Nagano during August?
The average wind speed in Nagano during August is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Nagano in August?
As you prepare for your trip to Nagano in August, 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 August, 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
- Sandals/Flip-flops: Comfortable for warm climates
- 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
- Insect Repellent: For destinations with mosquitos or other insects
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