Average annual temperature is 14.7 °C
Absolute maximum temperature: 37.5 °C
Absolute minimum temperature: -7.6 °C
Number of sunny days: 158 days
Number of rainy days: 201 days
Number of snow days: 6 days
Look at detailed online map of Iwasome
* Weather data for Iwasome 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) | 13.6 | 16.9 | 22.2 | 28.4 | 32.0 | 30.6 | 37.5 | 36.1 | 32.2 | 24.9 | 25.6 | 19.0 |
| Average daytime temperature (°C) | 7.7 | 9.1 | 15.8 | 20.0 | 22.5 | 25.3 | 31.6 | 31.6 | 28.3 | 21.0 | 16.4 | 11.4 |
| Average temperature (°C) | 2.1 | 3.4 | 10.0 | 13.5 | 17.0 | 21.0 | 26.3 | 26.6 | 23.9 | 15.4 | 10.5 | 5.4 |
| Average night temperature (°C) | -1.6 | -0.6 | 5.0 | 8.0 | 12.2 | 17.5 | 21.7 | 23.0 | 20.9 | 10.7 | 6.1 | 1.1 |
| Absolute minimum temperature (°C) | -7.6 | -4.1 | -1.7 | 1.9 | 5.3 | 12.6 | 18.6 | 20.0 | 13.2 | 6.5 | -1.6 | -4.1 |
| 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 | 14.6 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.5 | 8.1 | 8.4 | 9.3 | 9.1 | 7.8 | 9.8 | 9.8 | 8.5 | 9.0 | 7.9 | 7.8 |
| Precipitation (mm) | 18 | 45 | 97 | 74 | 178 | 337 | 108 | 191 | 231 | 91 | 60 | 23 |
| Sunny days | 19 | 16 | 14 | 16 | 15 | 5 | 10 | 1 | 2 | 16 | 21 | 23 |
| Rainy days | 9 | 9 | 17 | 14 | 16 | 25 | 21 | 30 | 28 | 15 | 9 | 8 |
| Snow days | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Iwasome is at