Average annual temperature is 17.7 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -2.5 °C
Number of sunny days: 133 days
Number of rainy days: 229 days
Number of snow days: 3 days
Look at detailed online map of Iwanouechō
* Weather data for Iwanouechō 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) | 17.3 | 16.2 | 20.9 | 21.7 | 25.2 | 27.6 | 31.7 | 34.5 | 30.5 | 25.5 | 27.2 | 21.4 |
| Average daytime temperature (°C) | 10.1 | 11.4 | 15.4 | 17.7 | 21.1 | 24.6 | 29.4 | 30.8 | 28.2 | 22.5 | 17.6 | 12.8 |
| Average temperature (°C) | 8.1 | 9.4 | 12.7 | 15.5 | 18.6 | 22.4 | 26.8 | 27.9 | 25.7 | 19.8 | 14.9 | 10.5 |
| Average night temperature (°C) | 5.9 | 7.1 | 10.3 | 13.0 | 16.5 | 20.3 | 24.7 | 25.5 | 23.7 | 17.3 | 12.2 | 8.0 |
| Absolute minimum temperature (°C) | -2.5 | 3.5 | 3.0 | 9.8 | 11.2 | 16.7 | 22.3 | 23.3 | 20.6 | 13.4 | 7.2 | 1.8 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.4 | 12.4 | 11.4 | 10.5 | 10.0 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 6.2 | 6.3 | 8.0 | 8.2 | 8.5 | 8.0 | 9.0 | 11.0 | 9.2 | 8.8 | 7.1 | 5.5 |
| Precipitation (mm) | 110 | 132 | 126 | 217 | 270 | 253 | 219 | 187 | 193 | 25 | 120 | 93 |
| Sunny days | 13 | 12 | 16 | 16 | 9 | 9 | 3 | 3 | 6 | 19 | 17 | 10 |
| Rainy days | 16 | 16 | 15 | 14 | 22 | 21 | 28 | 28 | 24 | 12 | 13 | 20 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Iwanouechō during the most sunny months:
The largest precipitation sum in Iwanouechō is at