Weather & Climate at Portsmouth Shipyard Navy Base

Portsmouth, NH

Summary of the weather and climate in Portsmouth, NH:

The average high is 58.7°F and the average low is 37.1°F.
The hottest month is July with a high of 82°F.
The coldest month is January with a low of 14.8°F.
Annual rainfall is 50.89 inches; the rainiest month is March (4.99 in).
Annual snowfall is 59.9 inches; the snowiest month is January (18.1 in).

Source: NOAA climate normals.

Temperatures through the year

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Bars span each month's average low to average high (10°F – 90°F scale).

Monthly averages

Month	High (°F)	Low (°F)	Rain (in)	Snow (in)
January	33.9	14.8	3.61	18.1
February	37.6	17.6	3.55	12.9
March	45.4	25	4.99	11.4
April	57	34.2	4.7	2.7
May	67.6	43.4	4.24	0
June	76.9	53.1	4.34	0
July	82	58.5	4.1	0
August	80.6	57.2	3.49	0
September	72.8	49.9	4.05	0
October	61.3	38.7	4.57	0
November	50.1	31	4.86	1.8
December	39.1	21.3	4.39	13