Average annual temperature is 16.0 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: -4.0 °C
Number of sunny days: 154 days
Number of rainy days: 210 days
Number of snow days: 1 day
Look at detailed online map of Iseki
* Weather data for Iseki 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) | 16.5 | 15.5 | 20.3 | 22.4 | 26.4 | 30.0 | 32.4 | 32.7 | 31.1 | 24.7 | 24.0 | 19.5 |
| Average daytime temperature (°C) | 8.4 | 9.0 | 14.8 | 17.3 | 21.0 | 24.4 | 29.2 | 30.0 | 28.2 | 21.1 | 16.5 | 11.6 |
| Average temperature (°C) | 5.6 | 5.9 | 10.9 | 13.8 | 17.6 | 21.3 | 25.8 | 26.5 | 24.7 | 17.2 | 13.0 | 8.6 |
| Average night temperature (°C) | 3.0 | 3.0 | 7.3 | 10.5 | 14.6 | 18.8 | 23.0 | 24.0 | 21.9 | 14.1 | 10.0 | 5.9 |
| Absolute minimum temperature (°C) | -4.0 | -0.3 | 1.8 | 5.3 | 10.0 | 14.1 | 20.1 | 22.1 | 18.7 | 9.6 | 5.0 | 1.1 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| 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) | 7.3 | 7.2 | 8.7 | 8.4 | 9.3 | 6.8 | 10.6 | 9.8 | 9.9 | 8.6 | 7.6 | 7.2 |
| Precipitation (mm) | 87 | 49 | 122 | 246 | 279 | 502 | 77 | 205 | 108 | 91 | 121 | 49 |
| Sunny days | 15 | 15 | 17 | 14 | 17 | 10 | 11 | 3 | 8 | 15 | 14 | 15 |
| Rainy days | 15 | 13 | 14 | 16 | 14 | 20 | 20 | 28 | 22 | 16 | 16 | 16 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Iseki is at