Average annual temperature is 15.0 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: -8.2 °C
Number of sunny days: 104 days
Number of rainy days: 252 days
Number of snow days: 9 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) | 17.0 | 17.3 | 22.8 | 26.0 | 29.5 | 32.5 | 34.0 | 36.7 | 36.0 | 26.4 | 27.1 | 20.0 |
| Average daytime temperature (°C) | 6.0 | 7.3 | 14.5 | 17.3 | 21.7 | 25.9 | 30.9 | 34.0 | 29.4 | 20.6 | 15.9 | 9.8 |
| Average temperature (°C) | 2.3 | 3.0 | 9.1 | 12.8 | 16.9 | 21.7 | 26.5 | 29.1 | 24.8 | 15.4 | 11.5 | 5.5 |
| Average night temperature (°C) | -1.2 | -0.9 | 4.1 | 8.2 | 12.5 | 17.7 | 22.2 | 24.5 | 21.4 | 11.3 | 7.7 | 1.7 |
| Absolute minimum temperature (°C) | -8.2 | -7.6 | -1.7 | 1.9 | 6.0 | 11.9 | 18.3 | 22.5 | 15.7 | 5.6 | -0.3 | -6.8 |
| 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 | 10.8 | 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 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 5.0 | 5.7 | 7.7 | 7.9 | 8.6 | 7.9 | 9.6 | 11.2 | 8.3 | 8.1 | 6.1 | 5.0 |
| Precipitation (mm) | 260 | 195 | 174 | 218 | 299 | 404 | 246 | 65 | 294 | 202 | 237 | 260 |
| Sunny days | 4 | 7 | 16 | 12 | 13 | 2 | 12 | 13 | 5 | 8 | 7 | 5 |
| Rainy days | 23 | 17 | 15 | 18 | 18 | 28 | 19 | 18 | 25 | 23 | 23 | 25 |
| Snow days | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Ōshima during the most sunny months:
The largest precipitation sum in Ōshima is at