Average annual temperature is 16.1 °C
Absolute maximum temperature: 33.2 °C
Absolute minimum temperature: -5.0 °C
Number of sunny days: 154 days
Number of rainy days: 209 days
Number of snow days: 2 days
Look at detailed online map of Ryōseki
* Weather data for Ryōseki 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) | 19.5 | 16.6 | 23.4 | 23.8 | 26.6 | 29.7 | 31.9 | 33.2 | 33.0 | 27.4 | 24.9 | 19.9 |
| Average daytime temperature (°C) | 10.5 | 11.2 | 16.7 | 19.3 | 22.5 | 25.5 | 29.4 | 29.7 | 29.1 | 22.9 | 17.7 | 12.7 |
| Average temperature (°C) | 5.4 | 6.7 | 11.7 | 14.7 | 18.5 | 22.0 | 25.7 | 26.0 | 24.8 | 17.2 | 12.2 | 7.3 |
| Average night temperature (°C) | 1.4 | 3.1 | 7.2 | 10.1 | 14.8 | 19.0 | 22.5 | 23.4 | 21.5 | 12.3 | 7.6 | 3.0 |
| Absolute minimum temperature (°C) | -5.0 | -1.6 | -0.6 | 2.5 | 9.4 | 13.9 | 18.7 | 20.9 | 16.8 | 6.4 | 0.5 | -2.8 |
| 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) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.3 | 14.1 | 13.4 | 12.4 | 11.3 | 10.4 | 10.0 |
| 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) | 7.7 | 7.2 | 8.2 | 8.0 | 8.2 | 6.1 | 9.6 | 8.7 | 9.5 | 8.8 | 7.9 | 7.4 |
| Precipitation (mm) | 101 | 54 | 162 | 454 | 361 | 491 | 149 | 613 | 152 | 28 | 173 | 67 |
| Sunny days | 18 | 14 | 14 | 15 | 13 | 9 | 3 | 2 | 6 | 22 | 18 | 20 |
| Rainy days | 12 | 13 | 17 | 15 | 18 | 21 | 28 | 29 | 24 | 9 | 12 | 11 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Ryōseki is at