Average annual temperature is 14.5 °C
Absolute maximum temperature: 35.9 °C
Absolute minimum temperature: -8.8 °C
Number of sunny days: 109 days
Number of rainy days: 245 days
Number of snow days: 11 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) | 14.4 | 13.8 | 21.9 | 24.9 | 30.6 | 30.2 | 33.6 | 35.9 | 34.1 | 24.4 | 24.4 | 17.0 |
| Average daytime temperature (°C) | 5.8 | 6.5 | 14.3 | 17.1 | 21.5 | 25.2 | 30.0 | 32.8 | 29.4 | 19.6 | 15.0 | 9.3 |
| Average temperature (°C) | 2.1 | 2.6 | 9.0 | 12.3 | 16.7 | 21.1 | 25.7 | 28.2 | 24.7 | 14.9 | 10.8 | 5.5 |
| Average night temperature (°C) | -1.0 | -0.7 | 4.5 | 8.3 | 12.3 | 17.5 | 22.1 | 24.8 | 21.3 | 11.3 | 7.5 | 2.3 |
| Absolute minimum temperature (°C) | -8.8 | -6.0 | -1.6 | 1.6 | 4.1 | 12.1 | 16.9 | 22.0 | 15.9 | 6.2 | -0.2 | -4.4 |
| 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 | 9.8 |
| 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) | 5.2 | 6.2 | 7.8 | 8.1 | 9.2 | 7.8 | 9.3 | 10.6 | 8.6 | 8.3 | 6.2 | 4.5 |
| Precipitation (mm) | 162 | 103 | 144 | 236 | 256 | 387 | 313 | 118 | 209 | 153 | 216 | 230 |
| Sunny days | 3 | 8 | 16 | 14 | 16 | 7 | 8 | 6 | 6 | 11 | 8 | 6 |
| Rainy days | 22 | 17 | 15 | 16 | 15 | 23 | 23 | 25 | 24 | 20 | 22 | 23 |
| Snow days | 6 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The best time to visit Iijima during the most sunny months:
The largest precipitation sum in Iijima is at