Average annual temperature is 11.7 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: -10.4 °C
Number of sunny days: 87 days
Number of rainy days: 232 days
Number of snow days: 46 days
Look at detailed online map of Iwamichō
* Weather data for Iwamichō 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) | 9.3 | 9.2 | 19.7 | 22.5 | 27.7 | 29.0 | 32.1 | 36.7 | 31.7 | 22.4 | 22.4 | 13.9 |
| Average daytime temperature (°C) | 0.5 | 1.6 | 10.0 | 13.8 | 18.8 | 23.7 | 27.1 | 31.5 | 26.2 | 17.9 | 11.5 | 3.5 |
| Average temperature (°C) | -1.9 | -0.6 | 5.0 | 9.5 | 13.5 | 19.3 | 23.4 | 27.2 | 21.8 | 13.5 | 7.9 | 0.7 |
| Average night temperature (°C) | -4.3 | -2.9 | 0.8 | 5.8 | 9.3 | 16.0 | 20.2 | 23.9 | 18.4 | 9.7 | 4.9 | -2.1 |
| Absolute minimum temperature (°C) | -10.4 | -9.4 | -7.1 | -0.1 | 2.5 | 11.8 | 15.9 | 20.4 | 10.0 | 5.2 | -2.8 | -8.0 |
| 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 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.6 | 10.6 | 11.9 | 13.3 | 14.5 | 15.1 | 14.8 | 13.8 | 12.5 | 11.1 | 9.9 | 9.3 |
| 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) | 5.5 | 6.0 | 8.5 | 8.6 | 9.7 | 8.4 | 9.6 | 11.5 | 7.9 | 7.8 | 5.0 | 3.6 |
| Precipitation (mm) | 124 | 106 | 85 | 131 | 155 | 160 | 217 | 71 | 143 | 155 | 194 | 136 |
| Sunny days | 0 | 1 | 16 | 9 | 13 | 9 | 5 | 5 | 9 | 11 | 7 | 2 |
| Rainy days | 11 | 15 | 15 | 21 | 18 | 21 | 26 | 26 | 21 | 20 | 20 | 18 |
| Snow days | 20 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 11 |
The best time to visit Iwamichō during the most sunny months:
The largest precipitation sum in Iwamichō is at