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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.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
5
Dry days
Average rainy days
26
Rainy days
Average snowy days
0
Snow days
Average temperatures
31°/18°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
81 %
Avg humidity

Nagano in August average weather

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Temperatures trend during August in Nagano

See the weather trend as well as the moving average line
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August weather day by day

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Date Weather Temperatures Rain UV More
1 Aug. Sunny
Sunny
31° /16° 0 mm 8
2 Aug. Sunny
Sunny
33° /17° 0 mm 8
3 Aug. Patchy rain possible
Patchy rain possible
33° /20° 0.7 mm 7
4 Aug. Light rain shower
Light rain shower
32° /18° 8.5 mm 7
5 Aug. Light rain shower
Light rain shower
30° /20° 11.3 mm 7
6 Aug. Light rain shower
Light rain shower
29° /18° 12.9 mm 6
7 Aug. Light rain shower
Light rain shower
28° /17° 7.6 mm 6
8 Aug. Light rain shower
Light rain shower
28° /18° 4 mm 6
9 Aug. Patchy rain possible
Patchy rain possible
31° /15° 1.3 mm 7
10 Aug. Patchy rain possible
Patchy rain possible
29° /13° 0.1 mm 6
11 Aug. Patchy rain possible
Patchy rain possible
31° /19° 0.1 mm 7
12 Aug. Light rain shower
Light rain shower
29° /18° 3.9 mm 6
13 Aug. Light rain shower
Light rain shower
30° /20° 9.7 mm 6
14 Aug. Light rain shower
Light rain shower
31° /19° 16.2 mm 7
15 Aug. Light rain shower
Light rain shower
30° /18° 10 mm 7
16 Aug. Patchy rain possible
Patchy rain possible
30° /20° 2.3 mm 7
17 Aug. Patchy rain possible
Patchy rain possible
30° /20° 0.3 mm 7
18 Aug. Patchy rain possible
Patchy rain possible
30° /18° 2.2 mm 7
19 Aug. Patchy light rain with thunder
Patchy light rain with thunder
31° /17° 6.9 mm 7
20 Aug. Light rain shower
Light rain shower
30° /15° 3 mm 7
21 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
31° /20° 5.4 mm 7
22 Aug. Patchy rain possible
Patchy rain possible
32° /20° 2.4 mm 7
23 Aug. Heavy rain at times
Heavy rain at times
33° /20° 3.8 mm 7
24 Aug. Moderate or heavy rain shower
Moderate or heavy rain shower
31° /18° 18.7 mm 7
25 Aug. Patchy light rain with thunder
Patchy light rain with thunder
30° /17° 9.1 mm 7
26 Aug. Patchy rain possible
Patchy rain possible
32° /18° 7.4 mm 7
27 Aug. Patchy rain possible
Patchy rain possible
31° /18° 6.3 mm 7
28 Aug. Patchy rain possible
Patchy rain possible
29° /17° 8.8 mm 6
29 Aug. Patchy rain possible
Patchy rain possible
29° /16° 9.2 mm 6
30 Aug. Patchy rain possible
Patchy rain possible
30° /16° 6 mm 7
31 Aug. Partly cloudy
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

August rainfall patterns in Nagano

Explore the daily rainfall trends and prepare for Naganos August weather 💧

UV exposure in Nagano during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Location coordinates 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.

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