Nagano Climate: Weather by Month and Best Time to Visit
Best months for Nagano: May, September, June, July.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 1°C | -6°C | 148 mm | 23 | – | – | 2.3 |
| February | 2°C | -5°C | 123 mm | 18 | – | – | 2.8 |
| March | 6°C | -2°C | 135 mm | 17 | – | – | 3.7 |
| April | 13°C | 3°C | 114 mm | 15 | – | – | 5.6 |
| May | 20°C | 10°C | 133 mm | 15 | – | – | 6.5 |
| June | 23°C | 14°C | 182 mm | 19 | – | – | 6.1 |
| July | 26°C | 19°C | 240 mm | 22 | – | – | 6.1 |
| August | 28°C | 19°C | 170 mm | 20 | – | – | 6.1 |
| September | 23°C | 15°C | 184 mm | 17 | – | – | 6.3 |
| October | 17°C | 9°C | 159 mm | 15 | – | – | 5.9 |
| November | 11°C | 2°C | 115 mm | 16 | – | – | 4.9 |
| December | 4°C | -3°C | 139 mm | 21 | – | – | 2.9 |