Average annual temperature is 16.3 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -5.2 °C
Number of sunny days: 159 days
Number of rainy days: 205 days
Number of snow days: 1 day
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) | 14.6 | 18.2 | 23.6 | 23.3 | 27.1 | 30.2 | 33.9 | 34.5 | 32.4 | 28.6 | 25.1 | 21.9 |
| Average daytime temperature (°C) | 9.2 | 11.0 | 16.0 | 19.3 | 21.4 | 25.2 | 30.3 | 31.2 | 29.1 | 22.0 | 18.0 | 13.2 |
| Average temperature (°C) | 4.6 | 6.4 | 11.8 | 15.0 | 17.5 | 22.0 | 26.5 | 27.3 | 25.4 | 17.3 | 12.9 | 8.1 |
| Average night temperature (°C) | 0.8 | 2.4 | 8.0 | 11.1 | 13.6 | 19.2 | 23.1 | 24.1 | 22.2 | 13.1 | 9.0 | 3.8 |
| Absolute minimum temperature (°C) | -5.2 | -3.6 | 1.1 | 5.3 | 8.1 | 16.0 | 20.4 | 22.3 | 18.1 | 8.4 | 3.2 | -2.7 |
| 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) | 6.8 | 7.0 | 8.0 | 8.6 | 8.5 | 7.1 | 10.1 | 11.0 | 9.1 | 8.6 | 7.4 | 7.6 |
| Precipitation (mm) | 32 | 68 | 151 | 155 | 198 | 381 | 63 | 252 | 189 | 132 | 70 | 51 |
| Sunny days | 14 | 16 | 13 | 13 | 11 | 4 | 18 | 8 | 11 | 15 | 15 | 21 |
| Rainy days | 17 | 11 | 18 | 17 | 20 | 26 | 13 | 23 | 19 | 16 | 15 | 10 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Ōshima during the most sunny months:
The largest precipitation sum in Ōshima is at