Average annual temperature is 11.9 °C
Absolute maximum temperature: 35.4 °C
Absolute minimum temperature: -11.6 °C
Number of sunny days: 87 days
Number of rainy days: 249 days
Number of snow days: 29 days
Look at detailed online map of Ōshima
* Weather data for Ōshima 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) | 10.6 | 8.8 | 19.1 | 23.0 | 30.0 | 27.1 | 32.2 | 35.4 | 33.2 | 22.3 | 23.6 | 15.0 |
| Average daytime temperature (°C) | 1.5 | 2.2 | 9.8 | 15.4 | 19.5 | 23.2 | 28.1 | 32.3 | 27.0 | 17.5 | 12.8 | 6.4 |
| Average temperature (°C) | -1.4 | -0.7 | 4.6 | 9.8 | 14.3 | 19.1 | 23.9 | 26.7 | 22.4 | 13.0 | 8.3 | 2.2 |
| Average night temperature (°C) | -3.6 | -3.1 | 0.7 | 5.6 | 10.4 | 16.0 | 20.8 | 23.0 | 19.5 | 9.9 | 4.8 | -1.4 |
| Absolute minimum temperature (°C) | -9.9 | -5.6 | -3.3 | -0.2 | 3.7 | 11.7 | 16.0 | 20.4 | 11.9 | 4.4 | -2.9 | -11.6 |
| 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 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 10.2 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 4.3 | 4.8 | 7.6 | 7.8 | 8.6 | 7.7 | 9.5 | 11.5 | 8.2 | 8.4 | 6.1 | 5.1 |
| Precipitation (mm) | 318 | 240 | 118 | 168 | 182 | 242 | 173 | 57 | 204 | 170 | 204 | 255 |
| Sunny days | 3 | 6 | 14 | 11 | 13 | 4 | 4 | 7 | 3 | 8 | 10 | 4 |
| Rainy days | 14 | 13 | 17 | 19 | 18 | 26 | 27 | 24 | 27 | 23 | 20 | 21 |
| Snow days | 14 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
The best time to visit Ōshima during the most sunny months:
The largest precipitation sum in Ōshima is at