Jersey Climatic Classifications

CodeDescriptionGroupNumber of states/regionsStates/regions
CfbMarine west coast, warm summerTemperate12 Grouville Saint Brelade Saint Clement Saint Helier Saint John Saint Lawrence Saint Martin Saint Mary Saint Peter Saint Quen Saint Saviour Trinity

Summary: Most regions (12) in Jersey lie in the Marine west coast, warm summer climate zone (Köppen: Cfb). The mean average of annual temperatures range from a high of 12.52°C (54.54°F) in Trinity to a low of 12.41°C (54.34°F) in Saint Mary.

Climate Jersey: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)9.48(49.06)8.94(48.09)9.77(49.59)11.26(52.27)13.11(55.6)15.55(59.99)17.4(63.32)17.94(64.29)17.48(63.46)15.55(59.99)12.75(54.95)10.94(51.69)17.94(64.29)
Average high °C (°F)9.37(48.87)8.84(47.91)9.69(49.44)11.25(52.25)13.08(55.54)15.5(59.9)17.4(63.32)17.91(64.24)17.38(63.28)15.4(59.72)12.62(54.72)10.81(51.46)13.27(55.89)
Daily mean °C (°F)8.63(47.53)8.03(46.45)8.81(47.86)10.39(50.7)12.26(54.07)14.69(58.44)16.66(61.99)17.19(62.94)16.48(61.66)14.55(58.19)11.85(53.33)10.12(50.22)12.47(54.45)
Average low °C (°F)7.28(45.1)6.91(44.44)7.67(45.81)9.18(48.52)11.15(52.07)13.41(56.14)15.5(59.9)16.13(61.03)15.31(59.56)13.4(56.12)10.58(51.04)8.88(47.98)11.28(52.3)
Record low °C (°F)7.26(45.07)6.84(44.31)7.59(45.66)9.05(48.29)11.13(52.03)13.39(56.1)15.41(59.74)16.02(60.84)15.11(59.2)13.32(55.98)10.47(50.85)8.83(47.89)6.84(44.31)
Average precipitation mm (inches)132.13(5.2)119.31(4.7)84.68(3.33)64.1(2.52)68.19(2.68)71.39(2.81)68.14(2.68)105.2(4.14)84.18(3.31)135.92(5.35)148.62(5.85)161.82(6.37)103.64(4.08)
Average precipitation days (≥ 1.0 mm)18.8917.8914.6811.110.6211.6610.6213.0211.8418.0919.4719.5514.79
Average relative humidity (%)78.4677.9479.3979.2181.4283.5682.6780.8978.1877.9477.5277.4779.55
Mean monthly sunshine hours5.746.299.3212.6913.2613.2913.412.9611.216.916.085.689.74

Jersey Climate Graph

Jersey

Jersey’s Cities by Temperature

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

Grouville
12.52°C | 54.54°F
Saint John
12.52°C | 54.54°F
Trinity
12.52°C | 54.54°F
Saint Helier
12.52°C | 54.54°F
Saint Martin
12.52°C | 54.54°F
Saint Saviour
12.52°C | 54.54°F
Saint Clement
12.52°C | 54.54°F
Saint Brelade
12.41°C | 54.34°F
Saint Quen
12.41°C | 54.34°F
Saint Lawrence
12.41°C | 54.34°F
Saint Peter
12.41°C | 54.34°F
Saint Mary
12.41°C | 54.34°F

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