Average annual temperature is 10.3 °C
Absolute maximum temperature: 32.5 °C
Absolute minimum temperature: -13.3 °C
Number of sunny days: 84 days
Number of rainy days: 220 days
Number of snow days: 61 days
Look at detailed online map of Ōkawa
* Weather data for Ōkawa 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) | 8.5 | 9.0 | 16.5 | 18.6 | 23.8 | 26.7 | 31.4 | 32.5 | 27.7 | 22.8 | 21.2 | 13.2 |
| Average daytime temperature (°C) | -1.2 | 0.7 | 8.8 | 12.9 | 17.4 | 21.6 | 26.2 | 28.8 | 24.3 | 17.1 | 10.0 | 2.0 |
| Average temperature (°C) | -4.1 | -2.2 | 3.9 | 8.4 | 12.7 | 17.6 | 22.3 | 25.2 | 20.6 | 12.6 | 6.4 | -1.1 |
| Average night temperature (°C) | -6.8 | -5.0 | -0.2 | 5.0 | 8.8 | 14.5 | 19.4 | 22.4 | 17.5 | 8.8 | 3.3 | -4.3 |
| Absolute minimum temperature (°C) | -13.3 | -10.7 | -6.4 | -0.7 | 2.0 | 10.4 | 15.2 | 19.5 | 10.8 | 2.9 | -4.1 | -10.8 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.5 | 10.6 | 11.9 | 13.3 | 14.5 | 15.2 | 14.9 | 13.8 | 12.5 | 11.1 | 9.9 | 9.2 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 14.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.4 | 6.9 | 8.5 | 9.0 | 9.4 | 8.8 | 9.3 | 9.2 | 7.6 | 8.1 | 5.9 | 4.2 |
| Precipitation (mm) | 93 | 56 | 59 | 148 | 71 | 146 | 138 | 176 | 161 | 93 | 163 | 81 |
| Sunny days | 4 | 4 | 16 | 10 | 13 | 8 | 5 | 1 | 9 | 8 | 4 | 2 |
| Rainy days | 6 | 7 | 12 | 20 | 18 | 22 | 26 | 30 | 21 | 23 | 21 | 14 |
| Snow days | 21 | 17 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 15 |
The largest precipitation sum in Ōkawa is at