Japan
Nagano in August: weather & travel advice
This month's data profile
Rain shapes the decision
Nagano in August is climatically mixed. The average daily high is around 27 °C. With about 19 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
57/100 · #5
Warmth
#1
Dryness
#9
Sun
#4
Published best categories: Family
Nagano · AugustPhoto: Sl-Ziga · CC BY-SA 3.0Climate facts
- Average high
- 27 °C
- Average low
- 18 °C
- Rainy days (est.)
- 19 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 81 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| July | 27 | 17 | 20 | 187 | 5.9 | 81 | 1.3 | 58 |
| August (selected) | 27 | 18 | 19 | 159 | 5.9 | 81 | 1.3 | 57 |
| September | 23 | 14 | 16 | 177 | 4.7 | 83 | 1.3 | 65 |
How do the previous and next months compare?
Baseline: August (57/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| July | +1 | -0.9 °C | -0.8 °C | +1.3 | +27.5 mm | ±0 h | +0.3 % | +0.1 m/s |
| September | +8 | -4 °C | -4.2 °C | -2.5 | +17.5 mm | -1.2 h | +2.3 % | +0.1 m/s |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Nagano in August?
The average daily high is around 27 °C, with an average daily low of about 18 °C.
Does it rain a lot in Nagano in August?
The curated estimate is about 19 rainy days per month, not a directly measured long-term average. Total precipitation averages around 159 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Nagano?
By the climate score, May, June and September are the strongest months for Nagano. August is not among them.