Jamestown, Saint Helena, Saint Helena Climate

Weather: 21.6°C/70.88°F, Wind SW at 4.53 km/h, 57% Humidity, 0% Chance of rain

Saint Helena
(Photo by JJ Shev on Unsplash)
Contents

Jamestown Climate Summary

Located at an elevation of 57.51 meters (188.68 feet) above sea level, Jamestown has a Tropical and subtropical desert climate climate (Classification: Bwh). The district’s yearly temperature is 20.9ºC (69.62ºF) and it is 0.4% higher than Saint Helena’s averages. Jamestown typically receives about 17.88 millimeters (0.7 inches) of precipitation and has 74.87 rainy days (20.51% of the time) annually.

CountrySaint Helena
CitySaint Helena
Longitude-5.7151749
Latitude-15.9286343
Attitude/Elevation57.51m (188.68ft)
Local timeSunday 20:51
Annual high temperature22.19ºC (71.94ºF)
Annual low temperature19.61ºC (67.3ºF)
Average annual precip.17.88mm (0.7in)
Warmest monthFebruary (24.39ºC / 75.9ºF)
Coldest MonthSeptember (17.24ºC / 63.03ºF)
Wettest MonthJune (25.61mm / 1.01in)
Driest MonthNovember (14.02mm / 0.55in)
Number of days with rainfall (≥ 1.0 mm)74.87 days (20.51%)
Days with no rain290.13 days (79.49%)
Humidity75.88%

Climate Jamestown: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)26.44(79.59)27.42(81.36)26.44(79.59)26.44(79.59)26.44(79.59)25.46(77.83)23.5(74.3)22.52(72.54)22.52(72.54)22.52(72.54)22.52(72.54)24.48(76.06)27.42(81.36)
Average high °C (°F)23.64(74.55)24.39(75.9)24.22(75.6)23.82(74.88)23.3(73.94)22.45(72.41)21.19(70.14)20.41(68.74)20.11(68.2)20.14(68.25)20.74(69.33)21.88(71.38)22.19(71.94)
Daily mean °C (°F)22.46(72.43)23.22(73.8)23.28(73.9)22.84(73.11)21.99(71.58)20.92(69.66)19.76(67.57)19.0(66.2)18.66(65.59)18.7(65.66)19.32(66.78)20.65(69.17)20.9(69.62)
Average low °C (°F)20.79(69.42)21.93(71.47)22.35(72.23)21.93(71.47)20.88(69.58)19.61(67.3)18.4(65.12)17.67(63.81)17.24(63.03)17.35(63.23)18.0(64.4)19.1(66.38)19.61(67.3)
Record low °C (°F)11.75(53.15)11.75(53.15)12.73(54.91)12.73(54.91)10.77(51.39)9.79(49.62)9.79(49.62)7.83(46.09)7.83(46.09)6.86(44.35)7.83(46.09)9.79(49.62)6.86(44.35)
Average precipitation mm (inches)16.05(0.63)17.39(0.68)19.72(0.78)16.11(0.63)15.49(0.61)25.61(1.01)21.03(0.83)21.96(0.86)16.76(0.66)14.9(0.59)14.02(0.55)15.52(0.61)17.88(0.7)
Average precipitation days (≥ 1.0 mm)4.366.056.945.255.8810.778.559.624.983.564.094.816.24
Average relative humidity (%)77.7176.2375.6874.3373.7971.6372.3774.6277.180.0579.1877.8675.88
Mean monthly sunshine hours10.139.859.449.317.947.428.867.757.398.899.910.588.95

Climate Graph

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

Jamestown

Jamestown Temperature by Month

March
23.28°C | 73.9°F
February
23.22°C | 73.8°F
April
22.84°C | 73.11°F
January
22.46°C | 72.43°F
May
21.99°C | 71.58°F
June
20.92°C | 69.66°F
December
20.65°C | 69.17°F
July
19.76°C | 67.57°F
November
19.32°C | 66.78°F
August
19.0°C | 66.2°F
October
18.7°C | 65.66°F
September
18.66°C | 65.59°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
TemperatureMaxAverageMin
Max Temperature23.5°C (74.3°F)22.36°C (72.25°F)20.57°C (69.03°F)
Avg Temperature22.52°C (72.54°F)21.1°C (69.98°F)19.59°C (67.26°F)
Min Temperature20.57°C (69.03°F)19.27°C (66.69°F)9.79°C (49.62°F)
Dew PointMaxAverageMin
Dew Point18.61°C (65.5°F)17.03°C (62.65°F)13.71°C (56.68°F)
PrecipitationMaxAverageMinSum
Precipitation1.66mm | 0.07in0.53mm | 0.02in0.0mm | 0in16.38mm | 0.64in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind30.36kmh | 18.86mph24.48kmh | 15.21mph12.73kmh | 7.91mph
Gust Wind42.11kmh | 26.17mph33.39kmh | 20.75mph16.65kmh | 10.35mph
Sea Level PressureMaxAverageMin
Sea Level Pressure1.66mb0.53mb0.0mb
Jamestown

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
December° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2019-12-0119.59 | 67.2616.65 | 61.978024.48 | 15.2129.38 | 994.970.0 | 0
2019-12-0220.57 | 69.0317.63 | 63.738128.4 | 17.6529.38 | 994.970.1 | 0.0
2019-12-0320.57 | 69.0317.63 | 63.738230.36 | 18.8629.38 | 994.970.49 | 0.02
2019-12-0419.59 | 67.2616.65 | 61.977826.44 | 16.4329.38 | 994.970.59 | 0.02
2019-12-0520.57 | 69.0315.67 | 60.217321.54 | 13.3829.35 | 993.990.78 | 0.03
2019-12-0619.59 | 67.2614.69 | 58.446916.65 | 10.3529.32 | 993.010.69 | 0.03
2019-12-0719.59 | 67.2613.71 | 56.686512.73 | 7.9129.32 | 993.010.1 | 0.0
2019-12-0820.57 | 69.0314.69 | 58.446614.69 | 9.1329.35 | 993.990.0 | 0
2019-12-0921.54 | 70.7715.67 | 60.217017.63 | 10.9529.35 | 993.990.2 | 0.01
2019-12-1021.54 | 70.7716.65 | 61.977418.61 | 11.5629.32 | 993.010.78 | 0.03
2019-12-1122.52 | 72.5417.63 | 63.737523.5 | 14.629.32 | 993.011.18 | 0.05
2019-12-1221.54 | 70.7717.63 | 63.737626.44 | 16.4329.35 | 993.991.66 | 0.07
2019-12-1321.54 | 70.7717.63 | 63.737525.46 | 15.8229.38 | 994.970.88 | 0.03
2019-12-1421.54 | 70.7717.63 | 63.737527.42 | 17.0429.41 | 995.950.98 | 0.04
2019-12-1521.54 | 70.7717.63 | 63.737729.38 | 18.2629.38 | 994.970.59 | 0.02
2019-12-1621.54 | 70.7717.63 | 63.737826.44 | 16.4329.35 | 993.990.49 | 0.02
2019-12-1721.54 | 70.7717.63 | 63.738026.44 | 16.4329.35 | 993.990.2 | 0.01
2019-12-1820.57 | 69.0317.63 | 63.738129.38 | 18.2629.35 | 993.990.2 | 0.01
2019-12-1921.54 | 70.7717.63 | 63.737925.46 | 15.8229.38 | 994.970.29 | 0.01
2019-12-2021.54 | 70.7718.61 | 65.58122.52 | 13.9929.38 | 994.970.2 | 0.01
2019-12-2120.57 | 69.0316.65 | 61.977527.42 | 17.0429.38 | 994.970.1 | 0.0
2019-12-2221.54 | 70.7717.63 | 63.737627.42 | 17.0429.38 | 994.970.39 | 0.02
2019-12-2321.54 | 70.7717.63 | 63.737825.46 | 15.8229.38 | 994.970.78 | 0.03
2019-12-2421.54 | 70.7717.63 | 63.737827.42 | 17.0429.38 | 994.971.08 | 0.04
2019-12-2521.54 | 70.7717.63 | 63.737628.4 | 17.6529.38 | 994.970.59 | 0.02
2019-12-2620.57 | 69.0316.65 | 61.977727.42 | 17.0429.35 | 993.990.29 | 0.01
2019-12-2721.54 | 70.7717.63 | 63.737927.42 | 17.0429.38 | 994.970.49 | 0.02
2019-12-2821.54 | 70.7717.63 | 63.737826.44 | 16.4329.35 | 993.990.69 | 0.03
2019-12-2921.54 | 70.7717.63 | 63.737722.52 | 13.9929.32 | 993.010.69 | 0.03
2019-12-3021.54 | 70.7717.63 | 63.737623.5 | 14.629.32 | 993.010.49 | 0.02
2019-12-3121.54 | 70.7716.65 | 61.977321.54 | 13.3829.35 | 993.990.39 | 0.02

Jamestown 11 Year Historical Weather Data

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