Average annual temperature is 15.3 °C
Absolute maximum temperature: 34.7 °C
Absolute minimum temperature: -5.1 °C
Number of sunny days: 100 days
Number of rainy days: 256 days
Number of snow days: 9 days
Look at detailed online map of Biwajima
* Weather data for Biwajima 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) | 15.8 | 14.3 | 20.9 | 23.8 | 27.1 | 28.3 | 30.1 | 34.7 | 32.3 | 24.9 | 24.7 | 17.5 |
| Average daytime temperature (°C) | 6.4 | 6.5 | 13.1 | 16.2 | 20.1 | 24.2 | 27.3 | 31.7 | 27.7 | 20.1 | 15.9 | 10.4 |
| Average temperature (°C) | 3.5 | 3.6 | 8.5 | 11.9 | 15.9 | 21.0 | 25.3 | 29.3 | 25.4 | 17.6 | 13.3 | 7.8 |
| Average night temperature (°C) | 1.3 | 0.9 | 4.3 | 8.0 | 12.1 | 18.2 | 23.2 | 26.8 | 23.4 | 15.3 | 10.5 | 5.2 |
| Absolute minimum temperature (°C) | -5.1 | -5.1 | -1.4 | 2.8 | 5.4 | 13.8 | 18.5 | 23.9 | 18.5 | 11.2 | 4.5 | -0.9 |
| 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) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 10.2 | 9.6 |
| 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) | 4.7 | 5.6 | 8.0 | 8.1 | 8.3 | 8.2 | 9.5 | 11.8 | 7.8 | 8.1 | 6.5 | 4.2 |
| Precipitation (mm) | 226 | 160 | 117 | 99 | 191 | 209 | 112 | 23 | 189 | 337 | 266 | 419 |
| Sunny days | 1 | 3 | 14 | 11 | 12 | 6 | 14 | 18 | 6 | 5 | 7 | 3 |
| Rainy days | 25 | 21 | 17 | 19 | 19 | 24 | 17 | 13 | 24 | 26 | 23 | 28 |
| Snow days | 5 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Biwajima during the most sunny months:
The largest precipitation sum in Biwajima is at