Average annual temperature is 8.2 °C
Absolute maximum temperature: 28.2 °C
Absolute minimum temperature: -18.5 °C
Number of sunny days: 160 days
Number of rainy days: 171 days
Number of snow days: 34 days
Look at detailed online map of Iriechō
* Weather data for Iriechō 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) | 4.7 | 4.2 | 10.5 | 14.8 | 17.5 | 22.0 | 28.2 | 27.6 | 26.4 | 21.2 | 16.8 | 10.5 |
| Average daytime temperature (°C) | -2.9 | -1.9 | 5.2 | 9.9 | 13.3 | 17.1 | 22.6 | 24.5 | 22.5 | 15.6 | 9.9 | 2.0 |
| Average temperature (°C) | -7.1 | -6.0 | 1.4 | 6.2 | 9.7 | 14.5 | 19.2 | 22.1 | 19.8 | 12.5 | 6.9 | -1.5 |
| Average night temperature (°C) | -11.7 | -10.9 | -2.4 | 3.2 | 7.0 | 12.4 | 17.1 | 20.1 | 17.4 | 9.5 | 3.5 | -4.7 |
| Absolute minimum temperature (°C) | -18.5 | -18.1 | -11.1 | -3.4 | 1.9 | 7.9 | 12.1 | 14.7 | 12.3 | 5.1 | -4.3 | -9.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.3 | 15.0 | 13.9 | 12.5 | 11.0 | 9.8 | 9.1 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.4 | 7.7 | 8.5 | 8.5 | 10.0 | 7.5 | 9.5 | 8.0 | 7.7 | 8.0 | 6.6 | 6.3 |
| Precipitation (mm) | 25 | 37 | 108 | 168 | 65 | 85 | 71 | 82 | 177 | 96 | 90 | 39 |
| Sunny days | 19 | 15 | 18 | 10 | 14 | 10 | 15 | 8 | 9 | 12 | 12 | 18 |
| Rainy days | 2 | 1 | 11 | 20 | 17 | 20 | 16 | 23 | 21 | 19 | 17 | 4 |
| Snow days | 10 | 12 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 9 |
Months with the longest average daylight duration in Iriechō:
The largest precipitation sum in Iriechō is at