Average annual temperature is 16.5 °C
Absolute maximum temperature: 38.1 °C
Absolute minimum temperature: -5.7 °C
Number of sunny days: 163 days
Number of rainy days: 199 days
Number of snow days: 3 days
Look at detailed online map of Iinuma
* Weather data for Iinuma 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) | 13.9 | 18.2 | 24.1 | 26.3 | 32.6 | 31.7 | 38.1 | 37.8 | 35.7 | 27.8 | 25.0 | 19.5 |
| Average daytime temperature (°C) | 8.9 | 10.9 | 16.9 | 20.4 | 23.3 | 27.0 | 33.1 | 33.6 | 30.6 | 22.6 | 18.0 | 13.0 |
| Average temperature (°C) | 3.9 | 5.6 | 11.7 | 15.2 | 18.1 | 22.5 | 27.9 | 28.7 | 26.1 | 17.5 | 12.7 | 7.4 |
| Average night temperature (°C) | 0.0 | 1.0 | 7.1 | 10.8 | 13.9 | 19.1 | 23.7 | 25.3 | 23.0 | 13.3 | 8.5 | 3.1 |
| Absolute minimum temperature (°C) | -5.7 | -3.9 | 0.5 | 3.4 | 7.0 | 13.3 | 21.1 | 23.7 | 16.6 | 8.6 | 3.5 | -2.3 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.4 | 7.9 | 7.7 | 8.8 | 8.9 | 7.7 | 10.6 | 11.1 | 9.1 | 8.4 | 7.1 | 7.6 |
| Precipitation (mm) | 26 | 40 | 128 | 109 | 185 | 313 | 43 | 97 | 239 | 124 | 61 | 33 |
| Sunny days | 18 | 17 | 15 | 16 | 13 | 6 | 15 | 5 | 7 | 17 | 16 | 18 |
| Rainy days | 11 | 10 | 16 | 14 | 18 | 24 | 16 | 26 | 23 | 14 | 14 | 13 |
| Snow days | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Iinuma during the most sunny months:
The largest precipitation sum in Iinuma is at