Currently: 44 °F. Passing clouds. (Weather station: Pease Air Force Base / Portsmouth, USA). See more current weatherAnnual Weather Averages Near Portsmouth
Averages are for Pease Air Force Base / Portsmouth, which is 3 miles from Portsmouth.
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Portsmouth
High Temp: 81 °F
Low Temp: 18 °F
Mean Temp: 49 °F
Precipitation: 3.78"
Humidity: 70%
Dew Point: 39 °F
Wind: 14 mph
Pressure: 30.00 "Hg
Visibility: 12 mi
January Climate & Weather Averages in Portsmouth
High Temp: 34 °F
Low Temp: 18 °F
Mean Temp: 26 °F
Precipitation: 3.25"
Humidity: 69%
Dew Point: 17 °F
Wind: 16 mph
Pressure: 30.00 "Hg
Visibility: 12 mi
February Climate & Weather Averages in Portsmouth
High Temp: 36 °F
Low Temp: 20 °F
Mean Temp: 28 °F
Precipitation: 3.27"
Humidity: 66%
Dew Point: 17 °F
Wind: 16 mph
Pressure: 29.99 "Hg
Visibility: 13 mi
March Climate & Weather Averages in Portsmouth
High Temp: 43 °F
Low Temp: 27 °F
Mean Temp: 35 °F
Precipitation: 4.08"
Humidity: 65%
Dew Point: 23 °F
Wind: 17 mph
Pressure: 30.00 "Hg
Visibility: 13 mi
April Climate & Weather Averages in Portsmouth
High Temp: 55 °F
Low Temp: 37 °F
Mean Temp: 46 °F
Precipitation: 4.06"
Humidity: 64%
Dew Point: 32 °F
Wind: 16 mph
Pressure: 29.96 "Hg
Visibility: 13 mi
May Climate & Weather Averages in Portsmouth
High Temp: 66 °F
Low Temp: 47 °F
Mean Temp: 56 °F
Precipitation: 3.60"
Humidity: 69%
Dew Point: 44 °F
Wind: 14 mph
Pressure: 29.98 "Hg
Visibility: 13 mi
June Climate & Weather Averages in Portsmouth
High Temp: 75 °F
Low Temp: 56 °F
Mean Temp: 66 °F
Precipitation: 4.02"
Humidity: 73%
Dew Point: 55 °F
Wind: 13 mph
Pressure: 29.93 "Hg
Visibility: 11 mi
July Climate & Weather Averages in Portsmouth
High Temp: 81 °F
Low Temp: 62 °F
Mean Temp: 72 °F
Precipitation: 4.13"
Humidity: 74%
Dew Point: 61 °F
Wind: 12 mph
Pressure: 29.94 "Hg
Visibility: 11 mi
August Climate & Weather Averages in Portsmouth
High Temp: 80 °F
Low Temp: 61 °F
Mean Temp: 70 °F
Precipitation: 3.11"
Humidity: 74%
Dew Point: 61 °F
Wind: 11 mph
Pressure: 29.99 "Hg
Visibility: 12 mi
September Climate & Weather Averages in Portsmouth
High Temp: 72 °F
Low Temp: 54 °F
Mean Temp: 63 °F
Precipitation: 3.61"
Humidity: 76%
Dew Point: 54 °F
Wind: 12 mph
Pressure: 30.05 "Hg
Visibility: 12 mi
October Climate & Weather Averages in Portsmouth
High Temp: 61 °F
Low Temp: 43 °F
Mean Temp: 52 °F
Precipitation: 4.49"
Humidity: 74%
Dew Point: 43 °F
Wind: 14 mph
Pressure: 30.03 "Hg
Visibility: 13 mi
November Climate & Weather Averages in Portsmouth
High Temp: 49 °F
Low Temp: 33 °F
Mean Temp: 41 °F
Precipitation: 3.69"
Humidity: 70%
Dew Point: 31 °F
Wind: 14 mph
Pressure: 30.05 "Hg
Visibility: 13 mi
December Climate & Weather Averages in Portsmouth
High Temp: 39 °F
Low Temp: 24 °F
Mean Temp: 32 °F
Precipitation: 4.03"
Humidity: 72%
Dew Point: 23 °F
Wind: 15 mph
Pressure: 30.02 "Hg
Visibility: 12 mi