Average annual temperature is 13.5 °C
Absolute maximum temperature: 34.6 °C
Absolute minimum temperature: -8.4 °C
Number of sunny days: 134 days
Number of rainy days: 218 days
Number of snow days: 13 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) | 13.2 | 14.7 | 19.4 | 20.9 | 28.7 | 29.2 | 34.6 | 34.0 | 31.7 | 25.0 | 22.7 | 14.9 |
| Average daytime temperature (°C) | 4.9 | 5.9 | 13.0 | 16.7 | 19.8 | 24.4 | 29.1 | 30.8 | 27.4 | 20.2 | 14.4 | 8.3 |
| Average temperature (°C) | 0.9 | 1.3 | 7.3 | 11.4 | 15.1 | 20.5 | 25.0 | 27.6 | 23.8 | 15.1 | 9.7 | 4.0 |
| Average night temperature (°C) | -2.3 | -2.6 | 2.4 | 6.7 | 10.9 | 17.3 | 21.6 | 25.0 | 21.0 | 11.3 | 5.9 | 0.6 |
| Absolute minimum temperature (°C) | -7.7 | -8.4 | -3.9 | 0.8 | 2.8 | 11.9 | 16.9 | 22.4 | 13.8 | 6.9 | -1.2 | -3.6 |
| 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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.5 | 13.6 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 6.9 | 7.4 | 8.7 | 9.0 | 8.4 | 7.9 | 9.9 | 11.6 | 7.8 | 8.6 | 7.0 | 6.7 |
| Precipitation (mm) | 21 | 55 | 97 | 74 | 132 | 196 | 124 | 64 | 247 | 57 | 86 | 76 |
| Sunny days | 13 | 16 | 16 | 17 | 14 | 3 | 7 | 5 | 7 | 13 | 10 | 13 |
| Rainy days | 11 | 9 | 15 | 13 | 17 | 27 | 24 | 26 | 23 | 18 | 20 | 15 |
| Snow days | 7 | 3 | 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