Average annual temperature is 10 °C
Absolute maximum temperature: 26.9 °C
Absolute minimum temperature: -5.2 °C
Number of sunny days: 80
Number of rainy days: 281
Number of snow days: 4
Average annual precipitation: 1603 mm
Look at detailed online map of Dumbarton
* Weather data for Dumbarton United Kingdom is based on climate observations for 2023 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 11.5 | 11.3 | 13.1 | 15.3 | 20.9 | 26.9 | 23.3 | 23.6 | 25.8 | 18 | 12.3 | 12 |
| Average daytime temperature (°C) | 7.3 | 9 | 8.6 | 11.9 | 15.8 | 20.8 | 17.6 | 18.2 | 17.6 | 12.6 | 8.3 | 7.4 |
| Average temperature (°C) | 5.2 | 6.8 | 5.5 | 8.1 | 11.9 | 16.2 | 14.7 | 15.1 | 14.3 | 10.3 | 6 | 5.7 |
| Average night temperature (°C) | 3.2 | 4 | 2.2 | 4.4 | 8 | 11.3 | 12 | 12 | 11.2 | 7.8 | 3.3 | 3.8 |
| Absolute minimum temperature (°C) | -1.7 | -1.6 | -5.2 | -0.7 | 5.5 | 6.6 | 9.2 | 8.5 | 5.8 | 1.5 | -2.3 | -3.5 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 8.6 | 10.6 | 13 | 15.3 | 17.1 | 17.6 | 17.5 | 16.1 | 13.9 | 11.6 | 9.2 | 7.4 |
| Daylight mean duration (h) | 7.7 | 9.6 | 11.9 | 14.2 | 16.3 | 17.5 | 16.9 | 15 | 12.8 | 10.4 | 8.3 | 7.1 |
| Daylight minimum duration (h) | 7.1 | 8.6 | 10.7 | 13.1 | 15.4 | 17.2 | 16.1 | 13.9 | 11.7 | 9.3 | 7.5 | 7 |
| Sunshine mean duration (h) | 4.2 | 4.2 | 6.4 | 8.8 | 8.7 | 12.1 | 10.2 | 8.8 | 7.7 | 5.6 | 4.5 | 3.4 |
| Precipitation (mm) | 179 | 87 | 136 | 66 | 63 | 98 | 157 | 91 | 183 | 195 | 107 | 241 |
| Sunny days | 7 | 8 | 5 | 10 | 9 | 13 | 3 | 7 | 7 | 10 | 1 | |
| Rainy days | 24 | 20 | 24 | 20 | 22 | 17 | 31 | 28 | 23 | 24 | 20 | 28 |
The best time to visit Dumbarton during the most sunny months:
Months with the longest average daylight duration in Dumbarton:
The largest precipitation sum in Dumbarton is at