Average annual temperature is 10.3 °C
Absolute maximum temperature: 32.4 °C
Absolute minimum temperature: -15.1 °C
Number of sunny days: 119 days
Number of rainy days: 212 days
Number of snow days: 34 days
Look at detailed online map of Oiwakechō
* Weather data for Oiwakechō 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) | 7.4 | 7.8 | 15.7 | 15.9 | 20.6 | 24.1 | 30.4 | 32.4 | 27.8 | 22.9 | 19.9 | 13.1 |
| Average daytime temperature (°C) | -1.1 | 0.8 | 9.0 | 12.0 | 16.2 | 20.5 | 25.2 | 28.6 | 24.4 | 17.3 | 10.5 | 2.6 |
| Average temperature (°C) | -5.2 | -3.0 | 4.5 | 8.2 | 12.3 | 17.5 | 22.2 | 25.6 | 21.3 | 13.2 | 7.0 | -0.6 |
| Average night temperature (°C) | -8.8 | -7.8 | 0.7 | 4.7 | 8.6 | 15.0 | 19.6 | 23.2 | 18.5 | 10.0 | 4.0 | -3.7 |
| Absolute minimum temperature (°C) | -15.1 | -13.9 | -5.4 | -0.8 | 3.2 | 9.6 | 15.2 | 20.4 | 12.0 | 4.0 | -4.5 | -9.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 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 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.9 | 7.5 | 8.8 | 9.2 | 9.4 | 8.6 | 9.8 | 8.8 | 7.4 | 8.4 | 6.3 | 5.5 |
| Precipitation (mm) | 44 | 30 | 58 | 124 | 74 | 117 | 100 | 66 | 150 | 88 | 155 | 63 |
| Sunny days | 12 | 12 | 13 | 9 | 10 | 11 | 6 | 5 | 10 | 11 | 9 | 11 |
| Rainy days | 6 | 8 | 15 | 21 | 21 | 19 | 25 | 26 | 20 | 20 | 18 | 13 |
| Snow days | 13 | 8 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 7 |
The largest precipitation sum in Oiwakechō is at