Average annual temperature is 12.8 °C
Absolute maximum temperature: 34.6 °C
Absolute minimum temperature: -10.4 °C
Number of sunny days: 93 days
Number of rainy days: 240 days
Number of snow days: 32 days
Look at detailed online map of Iwayadō
* Weather data for Iwayadō 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) | 11.5 | 13.0 | 19.7 | 21.9 | 30.9 | 30.6 | 34.6 | 34.0 | 32.4 | 24.1 | 22.1 | 14.9 |
| Average daytime temperature (°C) | 3.6 | 4.3 | 13.0 | 16.5 | 20.4 | 24.5 | 28.8 | 31.8 | 27.3 | 18.9 | 13.2 | 6.7 |
| Average temperature (°C) | 0.0 | 0.2 | 6.6 | 10.6 | 14.7 | 20.1 | 24.3 | 27.4 | 23.0 | 13.6 | 8.8 | 3.1 |
| Average night temperature (°C) | -3.2 | -3.9 | 1.2 | 5.4 | 9.7 | 16.5 | 20.4 | 24.3 | 19.7 | 9.2 | 5.4 | 0.0 |
| Absolute minimum temperature (°C) | -10.1 | -10.4 | -6.2 | -0.6 | 1.2 | 11.5 | 15.6 | 20.3 | 11.2 | 3.3 | -0.8 | -5.3 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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 | 6.4 | 8.6 | 8.8 | 8.7 | 8.2 | 9.6 | 11.3 | 7.3 | 8.3 | 5.6 | 4.1 |
| Precipitation (mm) | 52 | 65 | 91 | 121 | 147 | 164 | 150 | 105 | 168 | 59 | 153 | 117 |
| Sunny days | 2 | 6 | 18 | 14 | 13 | 4 | 7 | 2 | 2 | 13 | 8 | 4 |
| Rainy days | 15 | 9 | 13 | 16 | 18 | 26 | 24 | 29 | 28 | 18 | 22 | 22 |
| Snow days | 14 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 |
The best time to visit Iwayadō during the most sunny months:
The largest precipitation sum in Iwayadō is at