Average annual temperature is 16.7 °C
Absolute maximum temperature: 39.2 °C
Absolute minimum temperature: -5.6 °C
Number of sunny days: 173 days
Number of rainy days: 190 days
Number of snow days: 2 days
Look at detailed online map of Iriya
* Weather data for Iriya 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) | 13.5 | 18.7 | 24.2 | 25.5 | 31.4 | 32.3 | 39.2 | 38.0 | 36.7 | 27.8 | 25.3 | 18.9 |
| Average daytime temperature (°C) | 8.9 | 11.2 | 17.2 | 20.5 | 23.1 | 27.0 | 34.1 | 33.8 | 30.5 | 22.7 | 18.0 | 13.2 |
| Average temperature (°C) | 4.0 | 5.9 | 12.1 | 15.3 | 18.1 | 22.6 | 28.5 | 28.9 | 26.1 | 17.7 | 12.9 | 7.8 |
| Average night temperature (°C) | 0.0 | 1.2 | 7.5 | 10.8 | 13.8 | 19.2 | 24.1 | 25.4 | 23.1 | 13.4 | 8.6 | 3.4 |
| Absolute minimum temperature (°C) | -5.6 | -4.2 | 0.7 | 3.8 | 7.3 | 13.5 | 21.2 | 23.6 | 16.6 | 9.2 | 3.8 | -1.9 |
| 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 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.3 | 7.8 | 7.6 | 8.7 | 8.7 | 7.3 | 10.6 | 11.2 | 9.0 | 8.5 | 7.1 | 7.8 |
| Precipitation (mm) | 28 | 41 | 119 | 90 | 163 | 307 | 42 | 103 | 216 | 94 | 62 | 29 |
| Sunny days | 20 | 18 | 15 | 15 | 14 | 7 | 14 | 6 | 10 | 16 | 17 | 21 |
| Rainy days | 10 | 9 | 16 | 15 | 17 | 23 | 17 | 25 | 20 | 15 | 13 | 10 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Iriya during the most sunny months:
The largest precipitation sum in Iriya is at