Average annual temperature is 10.8 °C
Absolute maximum temperature: 31.8 °C
Absolute minimum temperature: -12.2 °C
Number of sunny days: 92 days
Number of rainy days: 244 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) | 8.9 | 7.8 | 17.6 | 22.5 | 28.2 | 27.5 | 30.8 | 31.8 | 30.6 | 22.2 | 22.0 | 15.0 |
| Average daytime temperature (°C) | 1.0 | 1.5 | 9.1 | 13.8 | 18.3 | 22.1 | 27.2 | 29.4 | 25.3 | 16.2 | 11.8 | 6.0 |
| Average temperature (°C) | -2.3 | -1.5 | 4.3 | 8.5 | 13.0 | 17.8 | 22.5 | 24.5 | 21.1 | 11.6 | 7.4 | 1.9 |
| Average night temperature (°C) | -4.8 | -4.0 | 0.6 | 4.2 | 8.9 | 14.1 | 19.0 | 21.1 | 18.4 | 8.4 | 4.0 | -1.7 |
| Absolute minimum temperature (°C) | -12.2 | -9.4 | -3.5 | -2.1 | 1.1 | 7.8 | 14.5 | 18.9 | 13.8 | 3.5 | -7.4 | -8.2 |
| 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) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.3 | 5.8 | 7.6 | 7.8 | 8.9 | 7.7 | 9.3 | 10.9 | 8.1 | 8.1 | 5.9 | 4.6 |
| Precipitation (mm) | 255 | 214 | 147 | 191 | 279 | 353 | 198 | 84 | 216 | 181 | 266 | 281 |
| Sunny days | 5 | 7 | 15 | 12 | 15 | 6 | 4 | 7 | 3 | 8 | 6 | 4 |
| Rainy days | 10 | 11 | 16 | 18 | 16 | 24 | 27 | 24 | 27 | 23 | 24 | 24 |
| Snow days | 16 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
The best time to visit Ōshima during the most sunny months:
The largest precipitation sum in Ōshima is at