Currently: 61 °F. Cool. (Weather station: Saint Helena Island, Saint Helena). See more current weatherAnnual Weather Averages Near Jamestown
Averages are for Saint Helena Island, which is 4 miles from Jamestown.
Based on weather reports collected during 2005–2015.
All Year Climate & Weather Averages in Jamestown
High Temp: 76 °F
Low Temp: 57 °F
Mean Temp: 65 °F
Precipitation: 1.85"
Humidity: 84%
Dew Point: 60 °F
Wind: 14 mph
Pressure: 30.05 "Hg
Visibility: 14 mi
January Climate & Weather Averages in Jamestown
High Temp: 73 °F
Low Temp: 64 °F
Mean Temp: 68 °F
Precipitation: 1.67"
Humidity: 85%
Dew Point: 62 °F
Wind: 13 mph
Pressure: 29.99 "Hg
Visibility: 14 mi
February Climate & Weather Averages in Jamestown
High Temp: 74 °F
Low Temp: 66 °F
Mean Temp: 70 °F
Precipitation: 2.04"
Humidity: 86%
Dew Point: 65 °F
Wind: 13 mph
Pressure: 29.97 "Hg
Visibility: 16 mi
March Climate & Weather Averages in Jamestown
High Temp: 76 °F
Low Temp: 67 °F
Mean Temp: 72 °F
Precipitation: 2.08"
Humidity: 85%
Dew Point: 65 °F
Wind: 13 mph
Pressure: 29.97 "Hg
Visibility: 15 mi
April Climate & Weather Averages in Jamestown
High Temp: 74 °F
Low Temp: 67 °F
Mean Temp: 70 °F
Precipitation: 1.60"
Humidity: 83%
Dew Point: 64 °F
Wind: 14 mph
Pressure: 30.00 "Hg
Visibility: 14 mi
May Climate & Weather Averages in Jamestown
High Temp: 71 °F
Low Temp: 63 °F
Mean Temp: 67 °F
Precipitation: 1.88"
Humidity: 82%
Dew Point: 61 °F
Wind: 12 mph
Pressure: 30.04 "Hg
Visibility: 18 mi
June Climate & Weather Averages in Jamestown
High Temp: 67 °F
Low Temp: 60 °F
Mean Temp: 64 °F
Precipitation: 2.82"
Humidity: 82%
Dew Point: 57 °F
Wind: 14 mph
Pressure: 30.11 "Hg
Visibility: 16 mi
July Climate & Weather Averages in Jamestown
High Temp: 66 °F
Low Temp: 59 °F
Mean Temp: 63 °F
Precipitation: 2.35"
Humidity: 83%
Dew Point: 57 °F
Wind: 15 mph
Pressure: 30.14 "Hg
Visibility: 13 mi
August Climate & Weather Averages in Jamestown
High Temp: 64 °F
Low Temp: 57 °F
Mean Temp: 61 °F
Precipitation: 2.36"
Humidity: 84%
Dew Point: 55 °F
Wind: 16 mph
Pressure: 30.13 "Hg
Visibility: 12 mi
September Climate & Weather Averages in Jamestown
High Temp: 64 °F
Low Temp: 57 °F
Mean Temp: 60 °F
Precipitation: 1.80"
Humidity: 86%
Dew Point: 56 °F
Wind: 16 mph
Pressure: 30.11 "Hg
Visibility: 9 mi
October Climate & Weather Averages in Jamestown
High Temp: 65 °F
Low Temp: 58 °F
Mean Temp: 61 °F
Precipitation: 1.35"
Humidity: 87%
Dew Point: 56 °F
Wind: 17 mph
Pressure: 30.08 "Hg
Visibility: 10 mi
November Climate & Weather Averages in Jamestown
High Temp: 66 °F
Low Temp: 59 °F
Mean Temp: 63 °F
Precipitation: 0.89"
Humidity: 85%
Dew Point: 57 °F
Wind: 15 mph
Pressure: 30.05 "Hg
Visibility: 12 mi
December Climate & Weather Averages in Jamestown
High Temp: 69 °F
Low Temp: 61 °F
Mean Temp: 65 °F
Precipitation: 1.33"
Humidity: 84%
Dew Point: 59 °F
Wind: 13 mph
Pressure: 30.02 "Hg
Visibility: 14 mi