Average annual temperature is 13.6 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -7.8 °C
Number of sunny days: 83 days
Number of rainy days: 250 days
Number of snow days: 32 days
Look at detailed online map of Onnagawa
* Weather data for Onnagawa 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) | 12.2 | 10.7 | 18.6 | 18.3 | 23.4 | 27.1 | 29.8 | 34.3 | 32.2 | 23.1 | 22.2 | 14.4 |
| Average daytime temperature (°C) | 3.1 | 3.3 | 10.0 | 12.8 | 17.2 | 22.4 | 26.0 | 31.8 | 26.5 | 18.8 | 13.1 | 6.2 |
| Average temperature (°C) | 1.3 | 1.7 | 7.0 | 10.3 | 14.1 | 20.0 | 24.0 | 28.7 | 23.8 | 16.4 | 10.8 | 4.2 |
| Average night temperature (°C) | -0.5 | 0.0 | 4.3 | 8.0 | 11.5 | 17.9 | 22.4 | 26.4 | 21.7 | 14.3 | 8.1 | 2.1 |
| Absolute minimum temperature (°C) | -7.8 | -4.1 | -0.2 | 2.8 | 4.7 | 14.0 | 17.5 | 24.3 | 16.4 | 8.3 | 0.4 | -2.4 |
| 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 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 12.0 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.2 | 10.0 | 9.4 |
| 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) | 5.4 | 6.2 | 8.3 | 8.6 | 9.1 | 8.5 | 9.3 | 11.8 | 7.9 | 7.9 | 5.3 | 3.9 |
| Precipitation (mm) | 100 | 71 | 88 | 134 | 176 | 140 | 316 | 90 | 254 | 178 | 223 | 157 |
| Sunny days | 0 | 4 | 16 | 12 | 14 | 6 | 6 | 10 | 4 | 4 | 4 | 3 |
| Rainy days | 17 | 14 | 15 | 18 | 17 | 24 | 25 | 21 | 26 | 27 | 25 | 21 |
| Snow days | 14 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 7 |
The best time to visit Onnagawa during the most sunny months:
The largest precipitation sum in Onnagawa is at