Average annual temperature is 16.5 °C
Absolute maximum temperature: 39.2 °C
Absolute minimum temperature: -6.2 °C
Number of sunny days: 177 days
Number of rainy days: 186 days
Number of snow days: 2 days
Look at detailed online map of San’eichō
* Weather data for San’eichō 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) | 12.9 | 17.5 | 24.4 | 24.5 | 30.4 | 31.9 | 39.2 | 37.2 | 35.4 | 28.1 | 25.5 | 20.4 |
| Average daytime temperature (°C) | 8.6 | 10.8 | 16.8 | 20.1 | 22.5 | 26.5 | 33.7 | 33.3 | 30.2 | 22.5 | 18.1 | 13.3 |
| Average temperature (°C) | 3.8 | 5.7 | 11.9 | 15.2 | 17.9 | 22.4 | 28.3 | 28.6 | 25.9 | 17.5 | 12.8 | 7.7 |
| Average night temperature (°C) | -0.1 | 1.3 | 7.5 | 10.9 | 13.8 | 19.2 | 24.0 | 25.0 | 22.8 | 13.2 | 8.5 | 3.0 |
| Absolute minimum temperature (°C) | -6.2 | -3.8 | 0.5 | 4.3 | 7.0 | 14.4 | 20.7 | 23.4 | 16.4 | 9.2 | 3.9 | -2.4 |
| 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) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 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) | 7.2 | 7.5 | 7.5 | 8.7 | 8.4 | 7.5 | 10.7 | 11.2 | 8.8 | 8.7 | 7.1 | 7.7 |
| Precipitation (mm) | 26 | 38 | 135 | 114 | 152 | 299 | 63 | 139 | 208 | 99 | 58 | 33 |
| Sunny days | 18 | 18 | 16 | 15 | 15 | 7 | 13 | 6 | 11 | 21 | 14 | 23 |
| Rainy days | 12 | 9 | 15 | 15 | 16 | 23 | 18 | 25 | 19 | 10 | 16 | 8 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit San’eichō during the most sunny months:
The largest precipitation sum in San’eichō is at