Average annual temperature is 14.9 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -5.0 °C
Number of sunny days: 104 days
Number of rainy days: 254 days
Number of snow days: 7 days
Look at detailed online map of Seimi
* Weather data for Seimi 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) | 14.6 | 14.3 | 23.3 | 22.4 | 25.2 | 29.2 | 32.7 | 34.5 | 30.5 | 23.3 | 24.9 | 22.0 |
| Average daytime temperature (°C) | 6.8 | 8.2 | 14.5 | 16.9 | 20.9 | 24.4 | 29.4 | 30.9 | 27.1 | 19.7 | 15.5 | 10.2 |
| Average temperature (°C) | 4.2 | 4.7 | 9.5 | 12.6 | 16.8 | 20.8 | 25.4 | 26.6 | 23.2 | 16.0 | 11.6 | 6.7 |
| Average night temperature (°C) | 1.8 | 1.5 | 5.3 | 8.9 | 13.5 | 17.9 | 22.2 | 23.5 | 20.5 | 12.7 | 7.8 | 3.9 |
| Absolute minimum temperature (°C) | -5.0 | -2.4 | -2.9 | 4.9 | 7.4 | 13.8 | 18.6 | 21.3 | 16.4 | 6.8 | 1.3 | -2.5 |
| 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 | 14.2 | 13.4 | 12.4 | 11.3 | 10.3 | 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) | 5.4 | 5.8 | 8.1 | 7.8 | 8.4 | 7.9 | 9.4 | 9.4 | 8.3 | 8.2 | 6.6 | 5.3 |
| Precipitation (mm) | 129 | 143 | 102 | 211 | 210 | 157 | 246 | 180 | 163 | 52 | 94 | 137 |
| Sunny days | 8 | 6 | 17 | 14 | 11 | 8 | 4 | 0 | 4 | 13 | 11 | 8 |
| Rainy days | 20 | 20 | 14 | 16 | 20 | 22 | 27 | 31 | 26 | 18 | 19 | 21 |
| Snow days | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
The largest precipitation sum in Seimi is at