Average annual temperature is 17.0 °C
Absolute maximum temperature: 34.3 °C
Absolute minimum temperature: -4.2 °C
Number of sunny days: 141 days
Number of rainy days: 220 days
Number of snow days: 4 days
Look at detailed online map of Sumino
* Weather data for Sumino 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) | 16.3 | 17.1 | 21.6 | 24.5 | 27.9 | 31.2 | 33.3 | 33.5 | 34.3 | 26.7 | 25.8 | 21.4 |
| Average daytime temperature (°C) | 8.9 | 9.8 | 14.8 | 18.2 | 22.0 | 25.5 | 30.7 | 31.1 | 29.5 | 22.3 | 17.5 | 12.3 |
| Average temperature (°C) | 5.9 | 6.7 | 11.5 | 14.7 | 18.7 | 22.6 | 27.4 | 28.1 | 26.2 | 18.5 | 13.9 | 9.0 |
| Average night temperature (°C) | 3.4 | 3.7 | 7.8 | 11.1 | 15.5 | 20.0 | 24.1 | 25.2 | 23.2 | 15.3 | 10.8 | 6.1 |
| Absolute minimum temperature (°C) | -4.2 | 0.0 | 1.1 | 7.3 | 9.2 | 15.0 | 20.0 | 22.9 | 20.0 | 10.8 | 6.1 | -0.5 |
| 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 | 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) | 6.8 | 7.0 | 8.2 | 8.1 | 8.9 | 6.8 | 10.0 | 9.3 | 9.1 | 8.8 | 7.5 | 7.3 |
| Precipitation (mm) | 99 | 74 | 100 | 211 | 237 | 314 | 90 | 330 | 157 | 24 | 72 | 55 |
| Sunny days | 12 | 9 | 19 | 18 | 16 | 11 | 5 | 1 | 3 | 18 | 14 | 15 |
| Rainy days | 17 | 17 | 12 | 12 | 15 | 19 | 26 | 30 | 27 | 13 | 16 | 16 |
| Snow days | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Sumino is at