Average annual temperature is 13.4 °C
Absolute maximum temperature: 36.3 °C
Absolute minimum temperature: -10.2 °C
Number of sunny days: 99 days
Number of rainy days: 246 days
Number of snow days: 20 days
Look at detailed online map of Ichinosawa
* Weather data for Ichinosawa Japan is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 13.3 | 10.4 | 21.7 | 25.5 | 32.5 | 29.1 | 33.9 | 36.3 | 35.6 | 24.0 | 24.3 | 16.7 |
| Average daytime temperature (°C) | 3.9 | 4.5 | 13.0 | 17.6 | 21.3 | 25.0 | 29.9 | 34.0 | 29.2 | 19.4 | 14.5 | 8.5 |
| Average temperature (°C) | 0.5 | 1.0 | 6.9 | 11.2 | 15.5 | 20.2 | 25.0 | 28.3 | 24.0 | 14.3 | 9.6 | 3.7 |
| Average night temperature (°C) | -1.7 | -1.5 | 2.0 | 6.0 | 10.7 | 16.2 | 21.0 | 23.8 | 20.5 | 10.5 | 5.6 | 0.1 |
| Absolute minimum temperature (°C) | -7.0 | -5.3 | -4.1 | -0.8 | 2.3 | 9.2 | 17.1 | 20.3 | 13.3 | 5.1 | -0.4 | -10.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 10.2 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 3.6 | 4.4 | 7.5 | 7.6 | 8.7 | 7.7 | 9.6 | 11.5 | 8.2 | 7.9 | 5.7 | 5.1 |
| Precipitation (mm) | 245 | 160 | 122 | 131 | 171 | 249 | 177 | 45 | 175 | 156 | 191 | 208 |
| Sunny days | 5 | 6 | 15 | 13 | 13 | 3 | 3 | 17 | 5 | 4 | 8 | 7 |
| Rainy days | 17 | 14 | 16 | 17 | 18 | 27 | 28 | 14 | 25 | 27 | 22 | 21 |
| Snow days | 9 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Ichinosawa during the most sunny months:
The largest precipitation sum in Ichinosawa is at