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
High °F 46 45 48 52 57 61 66 66 64 59 52 48
Low °C 5 4 5 6 9 11 13 14 13 11 8 6
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

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