Average annual temperature is 15.7 °C
Absolute maximum temperature: 36.4 °C
Absolute minimum temperature: -5.0 °C
Number of sunny days: 122 days
Number of rainy days: 235 days
Number of snow days: 8 days
Look at detailed online map of Dejima
* Weather data for Dejima 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) | 15.4 | 10.9 | 20.3 | 23.2 | 28.8 | 31.3 | 33.5 | 36.4 | 33.8 | 25.7 | 26.2 | 22.4 |
| Average daytime temperature (°C) | 5.9 | 5.9 | 13.8 | 16.9 | 21.0 | 25.4 | 30.1 | 33.3 | 29.4 | 20.6 | 16.0 | 10.3 |
| Average temperature (°C) | 3.5 | 3.4 | 9.4 | 13.0 | 17.3 | 22.2 | 26.9 | 29.7 | 25.8 | 16.7 | 12.6 | 7.1 |
| Average night temperature (°C) | 1.3 | 0.9 | 5.8 | 9.5 | 13.9 | 19.3 | 23.8 | 26.3 | 23.0 | 13.6 | 9.6 | 4.2 |
| Absolute minimum temperature (°C) | -5.0 | -4.4 | -0.7 | 3.3 | 7.3 | 15.3 | 19.4 | 24.3 | 18.1 | 9.0 | 2.5 | -2.2 |
| 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 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.2 | 10.2 | 9.7 |
| 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) | 4.6 | 5.4 | 7.7 | 7.9 | 8.8 | 8.1 | 9.7 | 11.2 | 8.4 | 8.2 | 5.9 | 4.5 |
| Precipitation (mm) | 449 | 265 | 215 | 204 | 260 | 319 | 193 | 100 | 224 | 259 | 385 | 397 |
| Sunny days | 2 | 7 | 18 | 13 | 15 | 8 | 15 | 13 | 6 | 11 | 7 | 7 |
| Rainy days | 26 | 17 | 13 | 17 | 16 | 22 | 16 | 18 | 24 | 20 | 23 | 23 |
| Snow days | 3 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Dejima during the most sunny months:
The largest precipitation sum in Dejima is at