Currently: 56 °F. Passing clouds. (Weather station: Norfolk Naval Air Station, USA). See more current weatherAnnual Weather Averages Near Portsmouth
Averages are for Norfolk Naval Air Station, which is 7 miles from Portsmouth.
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Portsmouth
High Temp: 89 °F
Low Temp: 35 °F
Mean Temp: 62 °F
Precipitation: 3.65"
Humidity: 68%
Dew Point: 50 °F
Wind: 16 mph
Pressure: 30.06 "Hg
Visibility: 8 mi
January Climate & Weather Averages in Portsmouth
High Temp: 50 °F
Low Temp: 35 °F
Mean Temp: 42 °F
Precipitation: 3.27"
Humidity: 65%
Dew Point: 31 °F
Wind: 18 mph
Pressure: 30.11 "Hg
Visibility: 7 mi
February Climate & Weather Averages in Portsmouth
High Temp: 53 °F
Low Temp: 36 °F
Mean Temp: 44 °F
Precipitation: 2.85"
Humidity: 64%
Dew Point: 32 °F
Wind: 18 mph
Pressure: 30.10 "Hg
Visibility: 7 mi
March Climate & Weather Averages in Portsmouth
High Temp: 60 °F
Low Temp: 42 °F
Mean Temp: 51 °F
Precipitation: 3.34"
Humidity: 63%
Dew Point: 37 °F
Wind: 19 mph
Pressure: 30.07 "Hg
Visibility: 7 mi
April Climate & Weather Averages in Portsmouth
High Temp: 70 °F
Low Temp: 51 °F
Mean Temp: 60 °F
Precipitation: 3.07"
Humidity: 62%
Dew Point: 46 °F
Wind: 19 mph
Pressure: 30.01 "Hg
Visibility: 8 mi
May Climate & Weather Averages in Portsmouth
High Temp: 77 °F
Low Temp: 60 °F
Mean Temp: 69 °F
Precipitation: 3.53"
Humidity: 68%
Dew Point: 56 °F
Wind: 16 mph
Pressure: 30.02 "Hg
Visibility: 7 mi
June Climate & Weather Averages in Portsmouth
High Temp: 85 °F
Low Temp: 69 °F
Mean Temp: 77 °F
Precipitation: 4.02"
Humidity: 70%
Dew Point: 65 °F
Wind: 15 mph
Pressure: 29.99 "Hg
Visibility: 7 mi
July Climate & Weather Averages in Portsmouth
High Temp: 89 °F
Low Temp: 74 °F
Mean Temp: 81 °F
Precipitation: 4.85"
Humidity: 71%
Dew Point: 70 °F
Wind: 14 mph
Pressure: 30.00 "Hg
Visibility: 7 mi
August Climate & Weather Averages in Portsmouth
High Temp: 87 °F
Low Temp: 72 °F
Mean Temp: 80 °F
Precipitation: 5.01"
Humidity: 73%
Dew Point: 69 °F
Wind: 13 mph
Pressure: 30.03 "Hg
Visibility: 8 mi
September Climate & Weather Averages in Portsmouth
High Temp: 81 °F
Low Temp: 68 °F
Mean Temp: 74 °F
Precipitation: 4.65"
Humidity: 73%
Dew Point: 64 °F
Wind: 16 mph
Pressure: 30.05 "Hg
Visibility: 8 mi
October Climate & Weather Averages in Portsmouth
High Temp: 72 °F
Low Temp: 57 °F
Mean Temp: 64 °F
Precipitation: 3.26"
Humidity: 70%
Dew Point: 53 °F
Wind: 16 mph
Pressure: 30.07 "Hg
Visibility: 8 mi
November Climate & Weather Averages in Portsmouth
High Temp: 62 °F
Low Temp: 45 °F
Mean Temp: 54 °F
Precipitation: 3.11"
Humidity: 67%
Dew Point: 42 °F
Wind: 16 mph
Pressure: 30.13 "Hg
Visibility: 8 mi
December Climate & Weather Averages in Portsmouth
High Temp: 54 °F
Low Temp: 39 °F
Mean Temp: 47 °F
Precipitation: 2.86"
Humidity: 68%
Dew Point: 36 °F
Wind: 17 mph
Pressure: 30.13 "Hg
Visibility: 7 mi