Average annual temperature is 9.7 °C
Absolute maximum temperature: 25.0 °C
Absolute minimum temperature: -3.4 °C
Number of sunny days: 58 days
Number of rainy days: 304 days
Number of snow days: 3 days
Look at detailed online map of County Donegal
* Weather data for County Donegal Ireland is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 10.8 | 12.6 | 13.8 | 16.7 | 20.9 | 24.7 | 20.9 | 22.2 | 25.0 | 18.6 | 11.8 | 11.4 |
| Average daytime temperature (°C) | 6.7 | 8.5 | 8.4 | 11.3 | 14.6 | 20.0 | 15.7 | 16.6 | 16.7 | 12.6 | 8.4 | 7.6 |
| Average temperature (°C) | 4.8 | 6.6 | 5.4 | 8.1 | 11.1 | 15.9 | 13.3 | 13.9 | 13.6 | 10.3 | 6.5 | 6.1 |
| Average night temperature (°C) | 2.8 | 4.3 | 2.8 | 4.8 | 7.5 | 12.1 | 10.9 | 11.5 | 10.8 | 8.2 | 4.3 | 4.6 |
| Absolute minimum temperature (°C) | -3.4 | -0.7 | -3.2 | 0.5 | 4.4 | 8.4 | 8.5 | 8.2 | 6.1 | 2.8 | -1.8 | -0.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 8.0 | 10.0 | 12.0 | 15.0 | 16.0 | 17.0 | 17.0 | 15.0 | 13.0 | 11.0 | 9.0 | 7.0 |
| Daylight mean duration (h) | 7.9 | 9.7 | 11.9 | 14.1 | 16.1 | 17.2 | 16.7 | 14.9 | 12.7 | 10.5 | 8.5 | 7.3 |
| Daylight minimum duration (h) | 7.0 | 8.0 | 10.0 | 13.0 | 15.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 7.0 | 7.0 |
| Sunshine mean duration (h) | 2.4 | 3.2 | 4.6 | 7.4 | 8.9 | 11.5 | 8.4 | 8.7 | 6.7 | 4.1 | 3.5 | 1.6 |
| Precipitation (mm) | 166 | 97 | 171 | 103 | 78 | 104 | 266 | 174 | 156 | 170 | 159 | 257 |
| Sunny days | 3 | 6 | 6 | 6 | 8 | 10 | 0 | 1 | 4 | 2 | 9 | 3 |
| Rainy days | 26 | 22 | 24 | 24 | 23 | 20 | 31 | 30 | 26 | 29 | 21 | 28 |
| Snow days | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit County Donegal during the most sunny months:
Months with the longest average daylight duration in County Donegal:
The largest precipitation sum in County Donegal is at