Karuizawa Climate: Weather by Month and Best Time to Visit
Best months for Karuizawa: November, July, August, September.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 3°C | -4°C | 60 mm | 7 | – | – | 4.6 |
| February | 4°C | -4°C | 64 mm | 9 | – | – | 4.6 |
| March | 8°C | -1°C | 107 mm | 13 | – | – | 4.8 |
| April | 14°C | 5°C | 122 mm | 13 | – | – | 5.9 |
| May | 19°C | 10°C | 166 mm | 17 | – | – | 6.0 |
| June | 22°C | 15°C | 256 mm | 23 | – | – | 6.0 |
| July | 26°C | 19°C | 279 mm | 24 | – | – | 6.1 |
| August | 26°C | 19°C | 242 mm | 24 | – | – | 6.1 |
| September | 22°C | 16°C | 244 mm | 20 | – | – | 6.1 |
| October | 17°C | 9°C | 192 mm | 14 | – | – | 5.8 |
| November | 12°C | 3°C | 70 mm | 9 | – | – | 6.3 |
| December | 6°C | -1°C | 48 mm | 8 | – | – | 5.3 |