Average annual temperature is 13.5 °C
Absolute maximum temperature: 33.4 °C
Absolute minimum temperature: -11.0 °C
Number of sunny days: 138 days
Number of rainy days: 205 days
Number of snow days: 22 days
Look at detailed online map of Iijima
* Weather data for Iijima 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) | 14.2 | 13.9 | 21.4 | 26.2 | 28.2 | 28.5 | 32.4 | 33.4 | 32.5 | 23.3 | 22.3 | 18.4 |
| Average daytime temperature (°C) | 7.2 | 8.5 | 15.0 | 17.7 | 20.9 | 23.8 | 28.8 | 30.1 | 28.1 | 19.1 | 15.2 | 10.0 |
| Average temperature (°C) | 1.7 | 2.9 | 9.3 | 12.3 | 15.7 | 19.7 | 24.0 | 24.9 | 23.0 | 13.6 | 9.9 | 4.6 |
| Average night temperature (°C) | -2.1 | -1.5 | 4.5 | 7.2 | 11.5 | 16.1 | 19.9 | 20.8 | 19.3 | 9.1 | 5.6 | 0.2 |
| Absolute minimum temperature (°C) | -11.0 | -6.8 | -3.3 | 0.8 | 3.2 | 8.9 | 15.2 | 18.5 | 12.8 | 2.4 | -1.0 | -5.6 |
| 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) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 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) | 7.4 | 7.4 | 8.6 | 8.4 | 8.8 | 7.5 | 9.7 | 10.7 | 9.1 | 8.5 | 7.4 | 6.5 |
| Precipitation (mm) | 69 | 138 | 200 | 296 | 364 | 581 | 176 | 58 | 128 | 142 | 174 | 204 |
| Sunny days | 14 | 13 | 14 | 14 | 11 | 7 | 8 | 8 | 7 | 19 | 12 | 11 |
| Rainy days | 5 | 12 | 17 | 16 | 20 | 23 | 23 | 23 | 23 | 12 | 18 | 13 |
| Snow days | 12 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7 |
The best time to visit Iijima during the most sunny months:
The largest precipitation sum in Iijima is at