Average annual temperature is 16.0 °C
Absolute maximum temperature: 35.4 °C
Absolute minimum temperature: -4.1 °C
Number of sunny days: 191 days
Number of rainy days: 173 days
Number of snow days: 1 day
Look at detailed online map of Onomichi
* Weather data for Onomichi 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) | 15.0 | 14.1 | 20.2 | 22.9 | 27.0 | 29.4 | 34.5 | 35.4 | 34.0 | 28.8 | 26.3 | 20.4 |
| Average daytime temperature (°C) | 9.3 | 9.8 | 15.4 | 17.8 | 21.8 | 25.0 | 30.4 | 32.7 | 31.2 | 23.8 | 18.0 | 12.0 |
| Average temperature (°C) | 4.5 | 5.0 | 10.2 | 13.4 | 17.8 | 21.6 | 26.5 | 28.7 | 26.4 | 17.8 | 12.5 | 6.9 |
| Average night temperature (°C) | 0.6 | 0.7 | 5.6 | 9.1 | 14.1 | 18.5 | 22.9 | 24.9 | 22.1 | 12.2 | 7.8 | 2.5 |
| Absolute minimum temperature (°C) | -3.7 | -3.2 | -2.1 | 4.1 | 7.3 | 12.9 | 19.5 | 22.6 | 18.1 | 6.2 | 0.7 | -4.1 |
| 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) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 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) | 7.1 | 6.8 | 8.3 | 8.1 | 9.0 | 7.5 | 9.5 | 10.0 | 9.4 | 8.5 | 7.9 | 7.0 |
| Precipitation (mm) | 30 | 45 | 76 | 204 | 225 | 224 | 119 | 167 | 49 | 16 | 45 | 44 |
| Sunny days | 17 | 16 | 20 | 17 | 18 | 11 | 13 | 8 | 10 | 22 | 20 | 19 |
| Rainy days | 13 | 12 | 11 | 13 | 13 | 19 | 18 | 23 | 20 | 9 | 10 | 12 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Onomichi is at