Guernsey Climatic Classifications

Summary: Most regions (16) in Guernsey lie in the Marine west coast, warm summer climate zone (Köppen: Cfb). The mean average of annual temperatures range from a high of 12.51°C (54.52°F) in Saint Sampson to a low of 12.38°C (54.28°F) in Alderney.

Climate Guernsey: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)9.74(49.53)9.07(48.33)9.61(49.3)10.96(51.73)12.65(54.77)14.91(58.84)16.91(62.44)17.54(63.57)17.0(62.6)15.28(59.5)12.87(55.17)11.12(52.02)17.54(63.57)
Average high °C (°F)9.72(49.5)9.05(48.29)9.6(49.28)10.95(51.71)12.65(54.77)14.91(58.84)16.91(62.44)17.54(63.57)16.99(62.58)15.27(59.49)12.85(55.13)11.1(51.98)13.13(55.63)
Daily mean °C (°F)9.06(48.31)8.39(47.1)8.93(48.07)10.19(50.34)12.02(53.64)14.35(57.83)16.36(61.45)16.99(62.58)16.35(61.43)14.64(58.35)12.22(54.0)10.48(50.86)12.5(54.5)
Average low °C (°F)7.29(45.12)6.86(44.35)7.33(45.19)8.66(47.59)10.44(50.79)12.77(54.99)14.84(58.71)15.52(59.94)14.72(58.5)13.03(55.45)10.55(50.99)8.82(47.88)10.9(51.62)
Record low °C (°F)7.13(44.83)6.86(44.35)7.3(45.14)8.61(47.5)10.35(50.63)12.76(54.97)14.84(58.71)15.51(59.92)14.68(58.42)12.96(55.33)10.53(50.95)8.63(47.53)6.86(44.35)
Average precipitation mm (inches)64.51(2.54)51.69(2.04)39.26(1.55)30.26(1.19)27.33(1.08)32.44(1.28)24.01(0.95)43.08(1.7)37.2(1.46)69.28(2.73)74.08(2.92)79.69(3.14)47.74(1.88)
Average precipitation days (≥ 1.0 mm)14.3212.229.467.426.245.896.748.847.6713.0916.1214.9610.25
Average relative humidity (%)77.877.7179.3979.7882.3384.6384.1982.1779.578.477.2276.9980.01
Mean monthly sunshine hours5.526.199.1412.3713.0913.2713.4212.7111.046.725.865.339.55

Guernsey Climate Graph

Guernsey

Guernsey’s Cities by Temperature

Guernsey’s states/regions ranking by average yearly temperature:

Lihou
12.51°C | 54.52°F
Saint Saviour
12.51°C | 54.52°F
Forest
12.51°C | 54.52°F
Saint Sampson
12.51°C | 54.52°F
Vale
12.51°C | 54.52°F
Torteval
12.51°C | 54.52°F
Saint Pierre du Bois
12.51°C | 54.52°F
Castel
12.51°C | 54.52°F
Jethou
12.51°C | 54.52°F
Herm
12.51°C | 54.52°F
Brecqhou
12.51°C | 54.52°F
St Andrew
12.51°C | 54.52°F
Saint Martin
12.51°C | 54.52°F
Sark
12.51°C | 54.52°F
Saint Peter Port
12.51°C | 54.52°F
Alderney
12.38°C | 54.28°F

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