NaganoPhoto: Sl-Ziga · CC BY-SA 3.0Japan · Asia
Best time to visit Nagano
Nagano in the Japan Alps is famous for the snow monkeys in their hot spring, the Zenkō-ji temple and ski resorts (1998 Olympics). Cold, snowy winters and mild summers.
Climate decision
Best travel months for Nagano
Top recommendation
Next highest scores
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Latest 5-year values 2021–2025
Average of the five most recent complete years compared with the 1991–2025 climate average.
March · Mean daily maximum
8.4 °C
1991–2025: 6.3 °C
+2.1 °C · higher
August · Wet days
22.6 days/month
1991–2025: 18.9 days/month
+3.7 days/month · higher
May · Monthly precipitation
154.7 mm/month
1991–2025: 107.2 mm/month
+47.4 mm/month · higher
July · Sunshine per day
6.5 h/day
1991–2025: 5.9 h/day
+0.6 h/day · higher
August: 8/155 days at or above 30 °C; highest single value 30.7 °C.
Five-year historical sample, not a weather forecast or long-term climate trend. Individual hot days can be far above the monthly mean.
Annual profile · Seasonal contrast
Nagano: temperature opens and closes the travel window
Average daily highs span 27.3 °C across the year. This marked contrast shapes the choice of month more than small differences in rain or sunshine.
The key decision
Choose the suitable temperature range first. Within that window, dryness and sunshine identify the stronger month.
Lowest average daily low
January · -8.3 °C
Highest average daily high
August · 27.5 °C
Fewest rainy days
April · 12
Most sunshine
May · 6.6 h
Month by month
Overall suitability per month. Tap a month for details.
All climate figures compared
The table is the complete accessible data view; the charts below highlight selected patterns.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Rain mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| January | 0 | -8 | 19 | 90 | 2.9 | 89 | 2.4 | 17 |
| February | 1 | -8 | 15 | 71 | 3.9 | 87 | 2.6 | 25 |
| March | 6 | -4 | 14 | 93 | 5.0 | 82 | 2.5 | 33 |
| April | 14 | 1 | 12 | 91 | 6.1 | 76 | 2.2 | 52 |
| May | 19 | 7 | 13 | 107 | 6.6 | 75 | 1.8 | 69 |
| June | 23 | 13 | 16 | 149 | 6.0 | 79 | 1.4 | 67 |
| July | 27 | 17 | 20 | 187 | 5.9 | 81 | 1.3 | 58 |
| August | 27 | 18 | 19 | 159 | 5.9 | 81 | 1.3 | 57 |
| September | 23 | 14 | 16 | 177 | 4.7 | 83 | 1.3 | 65 |
| October | 17 | 7 | 15 | 143 | 4.0 | 84 | 1.5 | 53 |
| November | 11 | 1 | 15 | 96 | 3.2 | 85 | 1.7 | 33 |
| December | 4 | -4 | 20 | 94 | 2.7 | 88 | 2.1 | 18 |
Climate through the year
Compare temperature, rainy days, sunshine and, for coastal destinations, sea temperature month by month.
Find a place to stay
Where to stay in Nagano
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The number is the overall climate score, not a similarity score.
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Frequently asked questions
When is the best time to visit Nagano?
The strongest climate months are May, June, September. Values are historical averages, not a forecast.
Which month has the highest average daily maximum temperature in Nagano?
The average daily maximum temperature in Nagano is highest in August at around 27 °C.