Average annual temperature is 21.3 °C
Absolute maximum temperature: 30.6 °C
Absolute minimum temperature: 6.6 °C
Number of sunny days: 114 days
Number of rainy days: 251 days
Look at detailed online map of Seisui
* Weather data for Seisui 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) | 23.0 | 22.0 | 23.7 | 24.9 | 27.7 | 28.5 | 30.1 | 30.3 | 30.6 | 29.7 | 27.8 | 24.3 |
| Average daytime temperature (°C) | 17.0 | 18.2 | 19.8 | 22.1 | 24.1 | 26.9 | 29.2 | 28.8 | 29.3 | 26.2 | 22.5 | 19.5 |
| Average temperature (°C) | 14.8 | 15.9 | 17.4 | 19.7 | 21.9 | 24.6 | 27.3 | 26.9 | 26.8 | 23.1 | 19.7 | 16.8 |
| Average night temperature (°C) | 13.0 | 14.2 | 15.4 | 17.8 | 20.1 | 22.9 | 25.6 | 25.2 | 24.9 | 20.6 | 17.6 | 14.8 |
| Absolute minimum temperature (°C) | 6.6 | 11.0 | 10.6 | 13.2 | 15.8 | 20.3 | 23.7 | 23.3 | 23.1 | 17.2 | 12.6 | 10.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.6 | 11.2 | 12.0 | 12.8 | 13.5 | 13.9 | 13.7 | 13.1 | 12.3 | 11.5 | 10.8 | 10.4 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.3 | 6.3 | 7.8 | 8.5 | 8.6 | 7.4 | 10.8 | 9.2 | 10.9 | 9.2 | 8.8 | 6.1 |
| Precipitation (mm) | 89 | 90 | 207 | 258 | 164 | 545 | 152 | 431 | 93 | 87 | 41 | 121 |
| Sunny days | 18 | 14 | 9 | 9 | 11 | 3 | 0 | 0 | 0 | 18 | 18 | 14 |
| Rainy days | 13 | 14 | 22 | 21 | 20 | 27 | 31 | 31 | 30 | 13 | 12 | 17 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Seisui during the most sunny months:
The largest precipitation sum in Seisui is at