Average annual temperature is 12.6 °C
Absolute maximum temperature: 32.2 °C
Absolute minimum temperature: -12.7 °C
Number of sunny days: 115 days
Number of rainy days: 237 days
Number of snow days: 13 days
Look at detailed online map of Ōasumi
* Weather data for Ōasumi 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) | 12.6 | 13.5 | 19.6 | 23.0 | 27.8 | 28.3 | 32.2 | 30.3 | 30.0 | 25.2 | 22.7 | 17.1 |
| Average daytime temperature (°C) | 5.9 | 6.9 | 13.0 | 16.4 | 19.0 | 22.6 | 28.2 | 28.0 | 25.9 | 18.1 | 15.0 | 10.3 |
| Average temperature (°C) | 1.3 | 2.2 | 7.7 | 11.3 | 14.4 | 18.7 | 23.3 | 23.4 | 21.3 | 12.8 | 9.1 | 4.5 |
| Average night temperature (°C) | -2.0 | -2.2 | 3.4 | 7.0 | 10.4 | 15.5 | 19.1 | 19.8 | 17.6 | 8.6 | 4.7 | 0.0 |
| Absolute minimum temperature (°C) | -9.7 | -12.7 | -2.7 | 1.7 | 3.9 | 12.8 | 15.8 | 16.9 | 10.3 | 3.8 | -1.5 | -5.3 |
| 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) | 7.1 | 7.2 | 7.9 | 8.3 | 8.5 | 7.0 | 10.1 | 10.8 | 9.1 | 8.6 | 7.5 | 7.6 |
| Precipitation (mm) | 65 | 124 | 242 | 186 | 281 | 519 | 99 | 168 | 223 | 148 | 159 | 89 |
| Sunny days | 12 | 12 | 9 | 10 | 11 | 5 | 6 | 4 | 4 | 7 | 17 | 18 |
| Rainy days | 10 | 12 | 22 | 20 | 20 | 25 | 25 | 27 | 26 | 24 | 13 | 13 |
| Snow days | 9 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Ōasumi during the most sunny months:
The largest precipitation sum in Ōasumi is at