Average annual temperature is 13.0 °C
Absolute maximum temperature: 21.5 °C
Absolute minimum temperature: 4.3 °C
Number of sunny days: 125 days
Number of rainy days: 240 days
Look at detailed online map of Herm
* Weather data for Herm Guernsey is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 13.0 | 11.3 | 12.7 | 12.9 | 15.2 | 18.8 | 20.0 | 20.7 | 21.5 | 20.3 | 15.8 | 14.3 |
| Average daytime temperature (°C) | 10.2 | 9.7 | 10.3 | 10.9 | 13.1 | 15.9 | 17.1 | 17.9 | 19.1 | 16.8 | 13.3 | 12.2 |
| Average temperature (°C) | 9.3 | 8.8 | 9.3 | 10.0 | 12.2 | 15.0 | 16.4 | 17.1 | 18.0 | 15.8 | 12.3 | 11.3 |
| Average night temperature (°C) | 8.2 | 7.9 | 8.4 | 9.3 | 11.5 | 14.2 | 15.8 | 16.5 | 17.0 | 14.8 | 11.2 | 10.4 |
| Absolute minimum temperature (°C) | 4.3 | 5.6 | 4.5 | 7.6 | 10.5 | 12.2 | 14.5 | 15.3 | 13.2 | 11.2 | 7.3 | 5.6 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.7 | 10.1 | 11.9 | 13.7 | 15.4 | 16.2 | 15.8 | 14.4 | 12.6 | 10.8 | 9.1 | 8.2 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 10.0 | 12.0 | 14.0 | 15.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 3.6 | 5.7 | 5.6 | 8.8 | 12.2 | 13.0 | 11.0 | 9.7 | 9.4 | 6.7 | 4.6 | 3.8 |
| Precipitation (mm) | 127 | 14 | 109 | 61 | 28 | 21 | 54 | 109 | 72 | 137 | 209 | 171 |
| Sunny days | 5 | 13 | 2 | 14 | 21 | 21 | 11 | 9 | 13 | 9 | 2 | 5 |
| Rainy days | 26 | 15 | 29 | 16 | 10 | 9 | 20 | 22 | 17 | 22 | 28 | 26 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Herm during the most sunny months:
Months with the longest average daylight duration in Herm:
The largest precipitation sum in Herm is at