Guernsey, United Kingdom: Annual Weather Averages
August is the hottest month in Guernsey with an average temperature of 16.5°C (62°F) and the coldest is February at 5.5°C (42°F) with the most daily sunshine hours at 8 in July. The wettest month is January with an average of 100mm of rain. The best month to swim in the sea is in August when the average sea temperature is 17°C (63°F).
Average Temperature: Guernsey
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 7 | 6 | 7 | 9 | 12 | 14 | 16 | 17 | 16 | 13 | 10 | 8 |
| °F | 44 | 42 | 45 | 47 | 53 | 56 | 61 | 62 | 60 | 55 | 49 | 46 |
Average High/Low Temperature: Guernsey
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| High °C | 8 | 7 | 9 | 11 | 14 | 16 | 19 | 19 | 18 | 15 | 11 | 9 |
| Low °C | 5 | 4 | 5 | 6 | 9 | 11 | 13 | 14 | 13 | 11 | 8 | 6 |
| High °F | 46 | 45 | 48 | 52 | 57 | 61 | 66 | 66 | 64 | 59 | 52 | 48 |
| Low °F | 41 | 39 | 41 | 43 | 48 | 52 | 55 | 57 | 55 | 52 | 46 | 43 |
Average Rainfall: Guernsey
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 100 | 90 | 80 | 50 | 50 | 50 | 30 | 70 | 60 | 90 | 80 | 100 |
| Days | 24 | 21 | 21 | 19 | 17 | 16 | 16 | 17 | 17 | 23 | 23 | 23 |
Average Daily Sunshine Hours: Guernsey
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hours | 2 | 3 | 4 | 6 | 7 | 8 | 8 | 7 | 6 | 4 | 3 | 2 |
Average Sea Temperature: Guernsey
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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 10 | 9 | 9 | 10 | 12 | 14 | 16 | 17 | 16 | 15 | 13 | 11 |
| °F | 50 | 48 | 48 | 50 | 54 | 57 | 61 | 63 | 61 | 59 | 55 | 52 |
