Jersey Climatic Classifications

Code Description Group Number of states/regions States/regions
Cfb Marine west coast, warm summer Temperate 12 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 Grouville to a low of 12.41°C (54.34°F) in Saint Mary.

Climate Jersey: Weather By Month

Month Jan Feb Mar Apr May Jun Jul Aug Sep Nov Oct Dec Year
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) 18.89 17.89 14.68 11.1 10.62 11.66 10.62 13.02 11.84 18.09 19.47 19.55 14.79
Average relative humidity (%) 78.46 77.94 79.39 79.21 81.42 83.56 82.67 80.89 78.18 77.94 77.52 77.47 79.55
Mean monthly sunshine hours 5.74 6.29 9.32 12.69 13.26 13.29 13.4 12.96 11.21 6.91 6.08 5.68 9.74

Jersey Climate Graph

Jersey’s Cities by Temperature

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

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