Average annual temperature is 17.4 °C
Absolute maximum temperature: 33.1 °C
Absolute minimum temperature: -4.3 °C
Number of sunny days: 164 days
Number of rainy days: 201 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) | 18.9 | 18.6 | 24.1 | 23.9 | 28.0 | 30.2 | 33.0 | 32.5 | 33.1 | 27.0 | 26.3 | 22.5 |
| Average daytime temperature (°C) | 11.0 | 11.5 | 16.3 | 19.1 | 22.2 | 25.7 | 30.5 | 30.1 | 29.4 | 22.7 | 19.0 | 13.5 |
| Average temperature (°C) | 7.1 | 8.4 | 12.7 | 15.8 | 19.1 | 22.7 | 27.2 | 27.2 | 26.1 | 18.5 | 14.4 | 9.3 |
| Average night temperature (°C) | 4.2 | 5.8 | 9.3 | 12.6 | 16.4 | 20.4 | 24.4 | 24.9 | 23.4 | 15.0 | 10.7 | 6.0 |
| Absolute minimum temperature (°C) | -4.3 | 2.1 | 2.3 | 8.2 | 11.5 | 16.0 | 20.7 | 23.1 | 21.0 | 10.7 | 5.6 | -1.2 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.3 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.3 | 12.4 | 11.4 | 10.5 | 10.0 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.4 | 6.7 | 8.3 | 8.0 | 9.0 | 6.1 | 10.0 | 8.7 | 9.6 | 8.4 | 8.3 | 6.7 |
| Precipitation (mm) | 58 | 106 | 139 | 177 | 181 | 435 | 170 | 300 | 66 | 38 | 31 | 60 |
| Sunny days | 20 | 15 | 17 | 17 | 13 | 8 | 4 | 3 | 8 | 20 | 20 | 19 |
| Rainy days | 11 | 13 | 14 | 13 | 18 | 22 | 27 | 28 | 22 | 11 | 10 | 12 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Ōshima is at