Average annual temperature is 9.6 °C
Absolute maximum temperature: 31.7 °C
Absolute minimum temperature: -15.3 °C
Number of sunny days: 125 days
Number of rainy days: 210 days
Number of snow days: 30 days
Look at detailed online map of Ioharachō
* Weather data for Ioharachō 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) | 7.6 | 7.2 | 17.5 | 17.1 | 19.5 | 23.4 | 28.0 | 31.7 | 26.9 | 21.9 | 18.6 | 11.9 |
| Average daytime temperature (°C) | -1.9 | 0.0 | 8.3 | 11.1 | 15.3 | 19.9 | 24.3 | 27.6 | 23.4 | 16.3 | 9.6 | 1.6 |
| Average temperature (°C) | -5.2 | -3.3 | 4.0 | 7.6 | 11.5 | 16.7 | 21.3 | 24.6 | 20.3 | 12.3 | 6.0 | -1.6 |
| Average night temperature (°C) | -8.3 | -7.4 | 0.7 | 4.7 | 8.3 | 14.2 | 18.8 | 22.3 | 17.8 | 9.3 | 3.0 | -4.5 |
| Absolute minimum temperature (°C) | -15.3 | -14.4 | -5.5 | -0.5 | 2.8 | 9.0 | 14.1 | 18.6 | 11.5 | 2.9 | -5.8 | -9.5 |
| 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 | 7.4 | 8.9 | 9.1 | 9.5 | 8.6 | 10.2 | 8.9 | 7.3 | 8.4 | 6.5 | 6.0 |
| Precipitation (mm) | 44 | 38 | 70 | 142 | 77 | 131 | 89 | 95 | 177 | 91 | 155 | 70 |
| Sunny days | 16 | 11 | 15 | 9 | 10 | 9 | 6 | 4 | 7 | 12 | 11 | 15 |
| Rainy days | 3 | 7 | 15 | 21 | 21 | 21 | 25 | 27 | 23 | 19 | 18 | 10 |
| Snow days | 12 | 10 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 6 |
The largest precipitation sum in Ioharachō is at