Jamestown, Saint Helena, Saint Helena Climate

Weather: 0°C/0°F, Wind SW at 0 km/h, 0% 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.

Country Saint Helena
City Saint Helena
Longitude -5.7151749
Latitude -15.9286343
Attitude/Elevation 57.51m (188.68ft)
Local time Thursday 12:56
Annual high temperature 22.19ºC (71.94ºF)
Annual low temperature 19.61ºC (67.3ºF)
Average annual precip. 17.88mm (0.7in)
Warmest month February (24.39ºC / 75.9ºF)
Coldest Month September (17.24ºC / 63.03ºF)
Wettest Month June (25.61mm / 1.01in)
Driest Month November (14.02mm / 0.55in)
Number of days with rainfall (≥ 1.0 mm) 74.87 days (20.51%)
Days with no rain 290.13 days (79.49%)
Humidity 75.88%

Climate Jamestown: Weather By Month

Month Jan Feb Mar Apr May Jun Jul Aug Sep Nov Oct Dec Year
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) 4.36 6.05 6.94 5.25 5.88 10.77 8.55 9.62 4.98 3.56 4.09 4.81 6.24
Average relative humidity (%) 77.71 76.23 75.68 74.33 73.79 71.63 72.37 74.62 77.1 80.05 79.18 77.86 75.88
Mean monthly sunshine hours 10.13 9.85 9.44 9.31 7.94 7.42 8.86 7.75 7.39 8.89 9.9 10.58 8.95

Climate Graph

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

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
Temperature Max Average Min
Max Temperature 23.5°C (74.3°F) 22.36°C (72.25°F) 20.57°C (69.03°F)
Avg Temperature 22.52°C (72.54°F) 21.1°C (69.98°F) 19.59°C (67.26°F)
Min Temperature 20.57°C (69.03°F) 19.27°C (66.69°F) 9.79°C (49.62°F)
Dew Point Max Average Min
Dew Point 18.61°C (65.5°F) 17.03°C (62.65°F) 13.71°C (56.68°F)
Precipitation Max Average Min Sum
Precipitation 1.66mm | 0.07in 0.53mm | 0.02in 0.0mm | 0in 16.38mm | 0.64in
Snowdepth 0.0mm | 0in 0.0mm | 0in 0.0mm | 0in 0.0mm | 0in
Wind Max Average Min
Wind 30.36kmh | 18.86mph 24.48kmh | 15.21mph 12.73kmh | 7.91mph
Gust Wind 42.11kmh | 26.17mph 33.39kmh | 20.75mph 16.65kmh | 10.35mph
Sea Level Pressure Max Average Min
Sea Level Pressure 1.66mb 0.53mb 0.0mb

Daily Observations

Time Temperature Dew Point Humidity Wind Speed Pressure Precipitation
December ° C | ° F ° C | ° F % Kph | Mph Hg | Mb Total (mm/in)
2019-12-01 19.59 | 67.26 16.65 | 61.97 80 24.48 | 15.21 29.38 | 994.97 0.0 | 0
2019-12-02 20.57 | 69.03 17.63 | 63.73 81 28.4 | 17.65 29.38 | 994.97 0.1 | 0.0
2019-12-03 20.57 | 69.03 17.63 | 63.73 82 30.36 | 18.86 29.38 | 994.97 0.49 | 0.02
2019-12-04 19.59 | 67.26 16.65 | 61.97 78 26.44 | 16.43 29.38 | 994.97 0.59 | 0.02
2019-12-05 20.57 | 69.03 15.67 | 60.21 73 21.54 | 13.38 29.35 | 993.99 0.78 | 0.03
2019-12-06 19.59 | 67.26 14.69 | 58.44 69 16.65 | 10.35 29.32 | 993.01 0.69 | 0.03
2019-12-07 19.59 | 67.26 13.71 | 56.68 65 12.73 | 7.91 29.32 | 993.01 0.1 | 0.0
2019-12-08 20.57 | 69.03 14.69 | 58.44 66 14.69 | 9.13 29.35 | 993.99 0.0 | 0
2019-12-09 21.54 | 70.77 15.67 | 60.21 70 17.63 | 10.95 29.35 | 993.99 0.2 | 0.01
2019-12-10 21.54 | 70.77 16.65 | 61.97 74 18.61 | 11.56 29.32 | 993.01 0.78 | 0.03
2019-12-11 22.52 | 72.54 17.63 | 63.73 75 23.5 | 14.6 29.32 | 993.01 1.18 | 0.05
2019-12-12 21.54 | 70.77 17.63 | 63.73 76 26.44 | 16.43 29.35 | 993.99 1.66 | 0.07
2019-12-13 21.54 | 70.77 17.63 | 63.73 75 25.46 | 15.82 29.38 | 994.97 0.88 | 0.03
2019-12-14 21.54 | 70.77 17.63 | 63.73 75 27.42 | 17.04 29.41 | 995.95 0.98 | 0.04
2019-12-15 21.54 | 70.77 17.63 | 63.73 77 29.38 | 18.26 29.38 | 994.97 0.59 | 0.02
2019-12-16 21.54 | 70.77 17.63 | 63.73 78 26.44 | 16.43 29.35 | 993.99 0.49 | 0.02
2019-12-17 21.54 | 70.77 17.63 | 63.73 80 26.44 | 16.43 29.35 | 993.99 0.2 | 0.01
2019-12-18 20.57 | 69.03 17.63 | 63.73 81 29.38 | 18.26 29.35 | 993.99 0.2 | 0.01
2019-12-19 21.54 | 70.77 17.63 | 63.73 79 25.46 | 15.82 29.38 | 994.97 0.29 | 0.01
2019-12-20 21.54 | 70.77 18.61 | 65.5 81 22.52 | 13.99 29.38 | 994.97 0.2 | 0.01
2019-12-21 20.57 | 69.03 16.65 | 61.97 75 27.42 | 17.04 29.38 | 994.97 0.1 | 0.0
2019-12-22 21.54 | 70.77 17.63 | 63.73 76 27.42 | 17.04 29.38 | 994.97 0.39 | 0.02
2019-12-23 21.54 | 70.77 17.63 | 63.73 78 25.46 | 15.82 29.38 | 994.97 0.78 | 0.03
2019-12-24 21.54 | 70.77 17.63 | 63.73 78 27.42 | 17.04 29.38 | 994.97 1.08 | 0.04
2019-12-25 21.54 | 70.77 17.63 | 63.73 76 28.4 | 17.65 29.38 | 994.97 0.59 | 0.02
2019-12-26 20.57 | 69.03 16.65 | 61.97 77 27.42 | 17.04 29.35 | 993.99 0.29 | 0.01
2019-12-27 21.54 | 70.77 17.63 | 63.73 79 27.42 | 17.04 29.38 | 994.97 0.49 | 0.02
2019-12-28 21.54 | 70.77 17.63 | 63.73 78 26.44 | 16.43 29.35 | 993.99 0.69 | 0.03
2019-12-29 21.54 | 70.77 17.63 | 63.73 77 22.52 | 13.99 29.32 | 993.01 0.69 | 0.03
2019-12-30 21.54 | 70.77 17.63 | 63.73 76 23.5 | 14.6 29.32 | 993.01 0.49 | 0.02
2019-12-31 21.54 | 70.77 16.65 | 61.97 73 21.54 | 13.38 29.35 | 993.99 0.39 | 0.02

Jamestown 11 Year Historical Weather Data

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