Climate & Temperature > Saint Helena > Jamestown, Saint Helena

Jamestown, Saint Helena Climate Guide to the Average Weather & Temperatures with Graphs Elucidating Sunshine and Rainfall Data & Information about Wind Speeds & Humidity:

  • Jamestown, Saint Helena latitude & longitude; 15°55'S 5°43'W.
  • Altitude; 12 m (39 ft).
  • The average temperature in Jamestown, Saint Helena is 21.8 °C (71 °F).
  • The range of average monthly temperatures is 4 °C.
  • The warmest average max/ high temperature is 28 °C (82 °F) in March.
  • The coolest average min/ low temperature is 17 °C (63 °F) in July, August & September.
  • Jamestown, Saint Helena receives on average 137 mm (5.4 in) of precipitation annually or 11 mm (0.4 in) each month.
  • On balance there are 41 days annually on which greater than 0.1 mm (0.004 in) of precipitation (rain, sleet, snow or hail) occurrs or 3 days on an average month.
  • The month with the driest weather is November when on balance 0 mm (0.0 in) of rain, sleet, hail or snow falls across 0 days.
  • The month with the wettest weather is July when on balance 33 mm (1.3 in) of rain, sleet, hail or snow falls across 8 days.
  • Mean relative humidity for an average year is recorded as 69.6% and on a monthly basis it ranges from 63% in January to 76% in August.
  • On balance there are 0 days annually registering frost in Jamestown, Saint Helena and in July there are on average 0 days with frost.

Jamestown, Saint Helena Climate Graph (Metric | Imperial units)

Jamestown, Saint Helena Climate Graph

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Jamestown, Saint Helena Weather Averages

  Average Minimum Temperatures in Jamestown, Saint Helena (°C) Average Maximum Temperature in Jamestown, Saint Helena (°C) Jamestown, Saint Helena Average Temperature (°C) Average Sea Temp (°C) Average Precipitation/ Rainfall (mm) Wet Days (>0.1 mm) Average Sunlight Hours/ Day Relative Humidity (%) Average Wind Speed in Jamestown, Saint Helena (Beaufort) Average Number of Days with Frost  
Weather in Jamestown, Saint Helena in January 21 27 24 - 8 4 - 63 - 0 Average Temperature in Jamestown, Saint Helena in January
Weather in Jamestown, Saint Helena in February 21 27 24 - 10 4 - 65 - 0 Average Temperature in Jamestown, Saint Helena in February
Weather in Jamestown, Saint Helena in March 22 28 24 - 20 5 - 64.0 - 0 Average Temperature in Jamestown, Saint Helena in March
Weather in Jamestown, Saint Helena in April 21 27 24 - 10 3 - 65 - 0 Average Temperature in Jamestown, Saint Helena in April
Weather in Jamestown, Saint Helena in May 19 24 22 - 18 4 - 72 - 0 Average Temperature in Jamestown, Saint Helena in May
Weather in Jamestown, Saint Helena in June 18 23 21 - 18 6 - 72 - 0 Average Temperature in Jamestown, Saint Helena in June
Weather in Jamestown, Saint Helena in July 17 22 20 - 33 8 - 74 - 0 Average Temperature in Jamestown, Saint Helena in July
Weather in Jamestown, Saint Helena in August 17 22 20 - 10 3 - 76 - 0 Average Temperature in Jamestown, Saint Helena in August
Weather in Jamestown, Saint Helena in September 17 22 20 - 5 2 - 75 - 0 Average Temperature in Jamestown, Saint Helena in September
Weather in Jamestown, Saint Helena in October 18 23 20 - 2 1 - 72 - 0 Average Temperature in Jamestown, Saint Helena in October
Weather in Jamestown, Saint Helena in November 18 23 21 - 0 0 - 72 - 0 Average Temperature in Jamestown, Saint Helena in November
Weather in Jamestown, Saint Helena in December 19 24 22 - 3 1 - 65 - 0 Average Temperature in Jamestown, Saint Helena in December

Jamestown, Saint Helena Climograph/ Climate Chart (imperial)

Jamestown, Saint Helena Temperature Chart

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Jamestown, Saint Helena Temperatures in Farenheit

  Average Minimum Temperatures in Jamestown, Saint Helena (°F) Average Maximum Temperature in Jamestown, Saint Helena (°F) Average Temperature (°F) Average Sea Temp (°F) Average Precipitation/ Rainfall (in) Wet Days (>0.004 in) Average Sunlight Hours/ Day Relative Humidity (%) Average Wind Speed (Beaufort) Average Number of Days with Frost  
Temperatures in Jamestown, Saint Helena in January 70 81 75 - 0.3 4 - 63 - 0 Climate in Jamestown, Saint Helena in January
Temperatures in Jamestown, Saint Helena in February 70 81 75 - 0.4 4 - 65 - 0 Climate in Jamestown, Saint Helena in February
Temperatures in Jamestown, Saint Helena in March 72 82 75 - 0.8 5 - 64 - 0 Climate in Jamestown, Saint Helena in March
Temperatures in Jamestown, Saint Helena in April 70 81 75 - 0.4 3 - 65 - 0 Climate in Jamestown, Saint Helena in April
Temperatures in Jamestown, Saint Helena in May 66 75 72 - 0.7 4 - 72 - 0 Climate in Jamestown, Saint Helena in May
Temperatures in Jamestown, Saint Helena in June 64 73 70 - 0.7 6 - 72 - 0 Climate in Jamestown, Saint Helena in June
Temperatures in Jamestown, Saint Helena in July 63 72 68 - 1.3 8 - 74 - 0 Climate in Jamestown, Saint Helena in July
Temperatures in Jamestown, Saint Helena in August 63 72 68 - 0.4 3 - 76 - 0 Climate in Jamestown, Saint Helena in August
Temperatures in Jamestown, Saint Helena in September 63 72 68 - 0.2 2 - 75 - 0 Climate in Jamestown, Saint Helena in September
Temperatures in Jamestown, Saint Helena in October 64 73 68 - 0.1 1 - 72 - 0 Climate in Jamestown, Saint Helena in October
Temperatures in Jamestown, Saint Helena in November 64 73 70 - 0.0 0 - 72 - 0 Climate in Jamestown, Saint Helena in November
Temperatures in Jamestown, Saint Helena in December 66 75 72 - 0.1 1 - 65 - 0 Climate in Jamestown, Saint Helena in December

Figures for Jamestown, Saint Helena. See also:

Forum: Jamestown, Saint Helena
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