Average annual temperature is 11.3 °C
Absolute maximum temperature: 27.4 °C
Absolute minimum temperature: -4.1 °C
Number of sunny days: 72
Number of rainy days: 291
Number of snow days: 2
Average annual precipitation: 2086 mm
Look at detailed online map of Caernarfon
* Weather data for Caernarfon 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) | 12.2 | 12.5 | 12.8 | 16.4 | 20.5 | 27 | 22.7 | 23.8 | 27.4 | 18.2 | 13.6 | 12.7 |
| Average daytime temperature (°C) | 8.1 | 8.9 | 8.8 | 12 | 16 | 21.4 | 17.2 | 17.8 | 19.1 | 14.3 | 9.9 | 9.4 |
| Average temperature (°C) | 6.3 | 7.1 | 6.6 | 9 | 12.7 | 17.6 | 15.2 | 15.6 | 16.5 | 12.2 | 8.4 | 7.9 |
| Average night temperature (°C) | 4.4 | 5.3 | 4.5 | 5.9 | 9.2 | 13.3 | 13.2 | 13.3 | 14.1 | 10.2 | 6.4 | 6.1 |
| Absolute minimum temperature (°C) | -2.4 | 1.3 | -4.1 | 0.9 | 6.5 | 7.9 | 10.7 | 9.6 | 9.2 | 4.8 | -0.7 | -1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 8.9 | 10.8 | 12.9 | 15 | 16.6 | 17 | 16.9 | 15.6 | 13.7 | 11.6 | 9.5 | 7.9 |
| Daylight mean duration (h) | 8.2 | 9.9 | 11.9 | 14 | 15.9 | 16.9 | 16.4 | 14.7 | 12.7 | 10.6 | 8.7 | 7.7 |
| Daylight minimum duration (h) | 7.7 | 9 | 10.8 | 13 | 15 | 16.6 | 15.7 | 13.8 | 11.7 | 9.6 | 8 | 7.5 |
| Sunshine mean duration (h) | 4.2 | 4.4 | 5.9 | 8.8 | 11.3 | 12.7 | 9.9 | 9.2 | 8.4 | 6.7 | 4.9 | 3.4 |
| Precipitation (mm) | 256 | 49 | 312 | 95 | 50 | 69 | 228 | 166 | 182 | 205 | 217 | 258 |
| Sunny days | 4 | 8 | 3 | 8 | 16 | 12 | 2 | 7 | 6 | 5 | 1 | |
| Rainy days | 26 | 20 | 27 | 22 | 15 | 18 | 31 | 29 | 23 | 25 | 25 | 30 |
| Snow days | 1 | 1 |
The best time to visit Caernarfon during the most sunny months:
Months with the longest average daylight duration in Caernarfon:
The largest precipitation sum in Caernarfon is at