Average annual temperature is 16.9 °C
Absolute maximum temperature: 34.9 °C
Absolute minimum temperature: -4.5 °C
Number of sunny days: 140 days
Number of rainy days: 220 days
Number of snow days: 5 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) | 17.7 | 15.9 | 20.8 | 24.9 | 26.8 | 30.4 | 33.9 | 34.9 | 33.3 | 25.1 | 26.7 | 21.7 |
| Average daytime temperature (°C) | 8.7 | 9.5 | 15.5 | 18.8 | 22.5 | 25.6 | 30.9 | 32.3 | 29.9 | 21.7 | 16.9 | 11.9 |
| Average temperature (°C) | 5.6 | 6.1 | 11.4 | 14.7 | 18.7 | 22.6 | 27.5 | 28.5 | 26.2 | 18.1 | 13.6 | 8.9 |
| Average night temperature (°C) | 2.4 | 2.9 | 7.4 | 10.8 | 15.0 | 19.6 | 24.4 | 25.4 | 23.1 | 14.8 | 10.4 | 5.9 |
| Absolute minimum temperature (°C) | -4.5 | -1.2 | 2.2 | 5.9 | 9.6 | 13.9 | 20.8 | 23.6 | 19.7 | 10.3 | 4.7 | 1.6 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.3 | 6.7 | 8.8 | 8.1 | 9.4 | 7.1 | 10.5 | 10.1 | 9.9 | 8.6 | 7.3 | 7.2 |
| Precipitation (mm) | 67 | 41 | 99 | 172 | 214 | 384 | 78 | 199 | 100 | 70 | 139 | 54 |
| Sunny days | 9 | 14 | 17 | 14 | 14 | 11 | 9 | 4 | 8 | 13 | 15 | 12 |
| Rainy days | 20 | 12 | 14 | 16 | 17 | 19 | 22 | 27 | 22 | 18 | 15 | 18 |
| Snow days | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The largest precipitation sum in Ōkawa is at