Average annual temperature is 10.9 °C
Absolute maximum temperature: 26.6 °C
Absolute minimum temperature: -2.3 °C
Number of sunny days: 86 days
Number of rainy days: 277 days
Number of snow days: 2 days
Look at detailed online map of Killyleagh
* Weather data for Killyleagh United Kingdom is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 12.5 | 13.2 | 14.1 | 16.1 | 19.8 | 26.6 | 21.3 | 20.8 | 24.5 | 20.7 | 13.8 | 13.1 |
| Average daytime temperature (°C) | 8.3 | 10.0 | 9.6 | 11.7 | 15.7 | 20.3 | 17.6 | 18.5 | 18.1 | 14.5 | 10.2 | 9.6 |
| Average temperature (°C) | 6.2 | 7.9 | 6.8 | 8.7 | 12.1 | 16.5 | 14.8 | 15.4 | 15.0 | 12.2 | 7.8 | 7.7 |
| Average night temperature (°C) | 4.1 | 5.6 | 4.2 | 5.5 | 8.5 | 12.5 | 11.9 | 12.5 | 11.9 | 10.0 | 5.3 | 5.6 |
| Absolute minimum temperature (°C) | -2.3 | 0.1 | -2.3 | -0.6 | 3.9 | 9.1 | 9.4 | 8.3 | 6.8 | 3.7 | -0.2 | -2.1 |
| 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) | 8.0 | 9.7 | 11.9 | 14.1 | 16.0 | 17.1 | 16.6 | 14.9 | 12.7 | 10.5 | 8.5 | 7.4 |
| 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) | 4.1 | 4.2 | 5.3 | 8.8 | 10.2 | 12.2 | 9.6 | 10.0 | 7.3 | 4.9 | 4.7 | 2.2 |
| Precipitation (mm) | 63 | 18 | 125 | 109 | 52 | 45 | 187 | 96 | 120 | 135 | 84 | 164 |
| Sunny days | 9 | 14 | 4 | 5 | 11 | 15 | 0 | 4 | 6 | 4 | 10 | 4 |
| Rainy days | 20 | 14 | 27 | 25 | 20 | 15 | 31 | 27 | 24 | 27 | 20 | 27 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Killyleagh during the most sunny months:
Months with the longest average daylight duration in Killyleagh:
The largest precipitation sum in Killyleagh is at