Weather in Nagano for August 2026
Expect cooler weather in first days of August 2026 in Nagano with the forecast suggesting a temperature of 32.1 °C, lower than the historical average.
In general, the average temperature in Nagano at the beginning of August is 32.1 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 29.4 °C by the end of August.
Nagano experiences heavy rainfall in August, with over 20 rainy days and an average total precipitation 256.4 mm.
Is August a good time to visit Nagano? check out the best time to travel to Nagano page.
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Nagano Weather August
What’s the Weather Like in Nagano This August?
Temperatures trend during August in Nagano
August weather in Nagano day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. |  Sunny | 33° /18° | 0.1 mm | 8 | |
| 2 Aug. |  Patchy rain possible | 35° /19° | 4.2 mm | 8 | |
| 3 Aug. | Patchy rain possible | 32° /19° | 3.2 mm | 7 | |
| 4 Aug. |  Moderate or heavy rain shower | 31° /19° | 19.4 mm | 7 | |
| 5 Aug. | Moderate or heavy rain shower | 32° /19° | 7.2 mm | 7 | |
| 6 Aug. | Light rain shower | 32° /18° | 5.6 mm | 7 | |
| 7 Aug. |  Heavy rain at times | 30° /18° | 16 mm | 7 | |
| 8 Aug. | Light rain shower | 30° /17° | 2.9 mm | 6 | |
| 9 Aug. | Patchy rain possible | 30° /17° | 0.9 mm | 7 | |
| 10 Aug. | Heavy rain at times | 28° /16° | 10.5 mm | 6 | |
| 11 Aug. | Patchy rain possible | 31° /18° | 3.5 mm | 7 | |
| 12 Aug. | Light rain shower | 28° /18° | 7.5 mm | 6 | |
| 13 Aug. | Moderate or heavy rain shower | 29° /18° | 18.1 mm | 6 | |
| 14 Aug. | Moderate or heavy rain shower | 29° /18° | 19 mm | 6 | |
| 15 Aug. | Moderate or heavy rain shower | 28° /18° | 8.6 mm | 6 | |
| 16 Aug. | Moderate rain at times | 30° /17° | 6.1 mm | 7 | |
| 17 Aug. | Moderate or heavy rain shower | 28° /17° | 16.6 mm | 6 | |
| 18 Aug. | Moderate or heavy rain shower | 30° /17° | 7.5 mm | 7 | |
| 19 Aug. | Heavy rain at times | 31° /17° | 4.2 mm | 7 | |
| 20 Aug. | Moderate or heavy rain shower | 29° /17° | 22.3 mm | 7 | |
| 21 Aug. | Moderate or heavy rain shower | 30° /18° | 7.7 mm | 7 | |
| 22 Aug. | Patchy rain possible | 30° /18° | 2.4 mm | 7 | |
| 23 Aug. | Patchy rain possible | 31° /19° | 4 mm | 7 | |
| 24 Aug. | Moderate or heavy rain shower | 29° /18° | 11.8 mm | 7 | |
| 25 Aug. | Light rain shower | 29° /18° | 10.8 mm | 6 | |
| 26 Aug. | Patchy rain possible | 30° /18° | 7.4 mm | 7 | |
| 27 Aug. | Patchy rain possible | 30° /18° | 10.8 mm | 7 | |
| 28 Aug. | Patchy rain possible | 28° /16° | 6.4 mm | 6 | |
| 29 Aug. | Patchy rain possible | 29° /16° | 4.2 mm | 6 | |
| 30 Aug. | Moderate or heavy rain shower | 29° /17° | 6.2 mm | 6 | |
| 31 Aug. |  Overcast | 31° /17° | 1.4 mm | 7 | |
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Nagano weather in August vs July vs September
| July | August | September | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 29°/17° | 30°/18° | 26°/14° |
| Rainfall | 231 mm | 256 mm | 218 mm |
| Wind | 8.3 km/h | 8.7 km/h | 8.1 km/h |
| Humidity | 82% | 82% | 84% |
| Rainy days | 31 days | 30 days | 28 days |
| Dry days | 0 days | 1 days | 2 days |
Planning a trip to Nagano? Discover the best time to visit
Nagano in August - FAQ
What are the expected maximum and minimum temperatures in Nagano during August?
How much rainfall should be expected in Nagano during August?
What are the typical wind conditions in Nagano during August?
August rainfall patterns in Nagano
UV exposure in Nagano during August
What to pack to Nagano in August?
Warm & sunny · highs around 30 °C, frequent showers
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
👟 Footwear
🎒 Accessories
🧴 Personal Items
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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.