Saint Helier, Jersey Climate

Weather: 11.4°C/52.52°F, Wind SW at 4.12 km/h, 100% Humidity, 0% Chance of rain

Jersey
(Photo by JJ Shev on Unsplash)

Saint Helier Climate Summary

Located at an elevation of 15.46 meters (50.72 feet) above sea level, Saint Helier has a Marine west coast, warm summer climate (Classification: Cfb). The city’s yearly temperature is 12.52ºC (54.54ºF) and it is 0.05% higher than Jersey’s averages. Saint Helier typically receives about 104.3 millimeters (4.11 inches) of precipitation and has 176.47 rainy days (48.35% of the time) annually.

Country Jersey
Longitude -2.103233
Latitude 49.1805019
Attitude/Elevation 15.46m (50.72ft)
Local time Sunday 02:00
Annual high temperature 13.33ºC (55.99ºF)
Annual low temperature 11.34ºC (52.41ºF)
Average annual precip. 104.3mm (4.11in)
Warmest month August (17.94ºC / 64.29ºF)
Coldest Month February (6.96ºC / 44.53ºF)
Wettest Month December (162.92mm / 6.41in)
Driest Month April (64.38mm / 2.53in)
Number of days with rainfall (≥ 1.0 mm) 176.47 days (48.35%)
Days with no rain 188.53 days (51.65%)
Humidity 79.56%

Climate Saint Helier: Monthly Averages

Month Jan Feb Mar Apr May Jun Jul Aug Sep Nov Oct Dec Year
Record high °C (°F) 14.0(57.2) 15.0(59.0) 15.0(59.0) 18.0(64.4) 20.0(68.0) 24.0(75.2) 24.0(75.2) 24.0(75.2) 23.0(73.4) 21.0(69.8) 18.0(64.4) 15.0(59.0) 24.0(75.2)
Average high °C (°F) 9.48(49.06) 8.94(48.09) 9.77(49.59) 11.25(52.25) 13.05(55.49) 15.46(59.83) 17.4(63.32) 17.94(64.29) 17.48(63.46) 15.55(59.99) 12.75(54.95) 10.94(51.69) 13.33(55.99)
Daily mean °C (°F) 8.71(47.68) 8.08(46.54) 8.86(47.95) 10.4(50.72) 12.24(54.03) 14.67(58.41) 16.68(62.02) 17.24(63.03) 16.56(61.81) 14.63(58.33) 11.94(53.49) 10.2(50.36) 12.52(54.54)
Average low °C (°F) 7.3(45.14) 6.96(44.53) 7.72(45.9) 9.27(48.69) 11.17(52.11) 13.42(56.16) 15.56(60.01) 16.21(61.18) 15.45(59.81) 13.46(56.23) 10.65(51.17) 8.92(48.06) 11.34(52.41)
Record low °C (°F) -2.0(28.4) -2.0(28.4) -2.0(28.4) -1.0(30.2) 2.0(35.6) 2.0(35.6) 5.0(41.0) 6.0(42.8) 4.0(39.2) 2.0(35.6) 1.0(33.8) -3.0(26.6) -3.0(26.6)
Average precipitation mm (inches) 132.93(5.23) 119.52(4.71) 84.31(3.32) 64.38(2.53) 68.18(2.68) 71.08(2.8) 67.15(2.64) 105.25(4.14) 85.35(3.36) 139.13(5.48) 151.35(5.96) 162.92(6.41) 104.3(4.11)
Average precipitation days (≥ 1.0 mm) 18.82 18.0 14.45 10.91 10.55 11.55 10.55 12.91 11.73 18.09 19.55 19.36 14.71
Average relative humidity (%) 78.55 77.99 79.43 79.21 81.4 83.52 82.6 80.82 78.11 77.95 77.56 77.54 79.56
Mean monthly sunshine hours 5.74 6.31 9.3 12.68 13.26 13.29 13.4 12.96 11.21 6.91 6.06 5.67 9.73

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Saint Helier in recent years.

Saint Helier

Saint Helier Temperature by Month

August
17.24°C | 63.03°F
July
16.68°C | 62.02°F
September
16.56°C | 61.81°F
June
14.67°C | 58.41°F
October
14.63°C | 58.33°F
May
12.24°C | 54.03°F
November
11.94°C | 53.49°F
April
10.4°C | 50.72°F
December
10.2°C | 50.36°F
March
8.86°C | 47.95°F
January
8.71°C | 47.68°F
February
8.08°C | 46.54°F

Historical Data

Summary
  • 2010
  • 2011
  • 2012
  • 2013
  • 2014
  • 2015
  • 2016
  • 2017
  • 2018
  • 2019
  • 2020
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
Temperature Max Average Min
Max Temperature 15.0°C (59.0°F) 11.14°C (52.05°F) 6.0°C (42.8°F)
Avg Temperature 13.0°C (55.4°F) 9.82°C (49.68°F) 5.0°C (41.0°F)
Min Temperature 11.0°C (51.8°F) 8.79°C (47.82°F) -0.0°C (0°F)
Dew Point Max Average Min
Dew Point 10.0°C (50.0°F) 6.39°C (43.5°F) 1.0°C (33.8°F)
Precipitation Max Average Min Sum
Precipitation 20.2mm | 0.8in 2.88mm | 0.11in 0.0mm | 0in 80.6mm | 3.17in
Snowdepth 0.0mm | 0in 0.0mm | 0in 0.0mm | 0in 0.0mm | 0in
Wind Max Average Min
Wind 53.0kmh | 32.93mph 28.29kmh | 17.58mph 13.0kmh | 8.08mph
Gust Wind 82.0kmh | 50.95mph 41.0kmh | 25.48mph 20.0kmh | 12.43mph
Sea Level Pressure Max Average Min
Sea Level Pressure 20.2mb 2.88mb 0.0mb
Saint Helier

Daily Observations

Time Temperature Dew Point Humidity Wind Speed Pressure Precipitation
February ° C | ° F ° C | ° F % Kph | Mph Hg | Mb Total (mm/in)
2019-02-01 7 | 44.6 4 | 39.2 79 28 | 17.4 29.06 | 984 6.9 | 0.27
2019-02-02 5 | 41.0 1 | 33.8 71 46 | 28.58 29.74 | 1007 2.2 | 0.09
2019-02-03 8 | 46.4 2 | 35.6 65 23 | 14.29 30.27 | 1025 0.6 | 0.02
2019-02-04 9 | 48.2 6 | 42.8 83 45 | 27.96 30.15 | 1021 6.2 | 0.24
2019-02-05 8 | 46.4 7 | 44.6 92 31 | 19.26 30.24 | 1024 0.2 | 0.01
2019-02-06 11 | 51.8 10 | 50.0 92 19 | 11.81 30.06 | 1018 12.8 | 0.5
2019-02-07 10 | 50.0 5 | 41.0 73 47 | 29.2 29.91 | 1013 4.8 | 0.19
2019-02-08 11 | 51.8 8 | 46.4 81 53 | 32.93 29.71 | 1006 8.3 | 0.33
2019-02-09 10 | 50.0 6 | 42.8 76 53 | 32.93 29.74 | 1007 11.8 | 0.46
2019-02-10 9 | 48.2 5 | 41.0 74 51 | 31.69 29.62 | 1003 20.2 | 0.8
2019-02-11 9 | 48.2 4 | 39.2 69 30 | 18.64 30.27 | 1025 2.1 | 0.08
2019-02-12 9 | 48.2 6 | 42.8 77 15 | 9.32 30.56 | 1035 0.0 | 0.0
2019-02-13 9 | 48.2 5 | 41.0 76 24 | 14.91 30.5 | 1033 0.0 | 0.0
2019-02-14 9 | 48.2 5 | 41.0 74 24 | 14.91 30.42 | 1030 0.0 | 0.0
2019-02-15 11 | 51.8 7 | 44.6 79 25 | 15.53 30.3 | 1026 0.0 | 0.0
2019-02-16 11 | 51.8 8 | 46.4 84 24 | 14.91 30.24 | 1024 0.0 | 0.0
2019-02-17 11 | 51.8 8 | 46.4 83 33 | 20.51 30.03 | 1017 0.1 | 0.0
2019-02-18 9 | 48.2 7 | 44.6 83 20 | 12.43 30.03 | 1017 2.8 | 0.11
2019-02-19 9 | 48.2 5 | 41.0 72 19 | 11.81 30.15 | 1021 0.2 | 0.01
2019-02-20 10 | 50.0 7 | 44.6 82 27 | 16.78 30.15 | 1021 0.0 | 0.0
2019-02-21 10 | 50.0 8 | 46.4 83 22 | 13.67 30.33 | 1027 0.0 | 0.0
2019-02-22 11 | 51.8 7 | 44.6 77 19 | 11.81 30.47 | 1032 0.0 | 0.0
2019-02-23 11 | 51.8 8 | 46.4 81 17 | 10.56 30.47 | 1032 0.0 | 0.0
2019-02-24 11 | 51.8 7 | 44.6 73 13 | 8.08 30.5 | 1033 0.0 | 0.0
2019-02-25 11 | 51.8 6 | 42.8 71 15 | 9.32 30.53 | 1034 0.0 | 0.0
2019-02-26 12 | 53.6 8 | 46.4 75 14 | 8.7 30.42 | 1030 0.0 | 0.0
2019-02-27 13 | 55.4 10 | 50.0 81 15 | 9.32 30.27 | 1025 0.0 | 0.0
2019-02-28 11 | 51.8 9 | 48.2 85 40 | 24.85 30.15 | 1021 1.4 | 0.06

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