Portsmouth Weather Forecast
- 9
- 38
Chance Snow Showers
- 12
- 23
Chance Snow
- 12
- 25
Slight Chance Snow
- 24
- 36
Snow
- 21
- 42
Chance Rain
- 17
- 30
Mostly Sunny
Today 25 Dec Coastal Rockingham
Cloudy with a slight chance of snow Showers this Morning, then partly sunny this afternoon. Highs in the upper 30s. Temperatures falling into the lower 30s this afternoon. Southwest Winds around 10 Mph with Gusts up to 20 Mph, becoming northwest with Gusts up to 30 Mph this afternoon. Chance of snow 20 percent.
Tonight 25 Dec Coastal Rockingham
Mostly clear. Lows around 9 above. Northwest Winds 10 to 15 Mph with Gusts up to 35 Mph. Wind chill Values as low as 4 below.
Portsmouth Temperature Statistics
December Temperature
Pease Air Force Base / Portsmouth (3.1 miles)
Lowest 5 December, 2025
6.8 °FAverage December
29 °FHighest 19 December, 2025
55.4 °F
Climate (2020–Present)
Pease Air Force Base / Portsmouth (3.1 miles)
Average Low 2020–2025
42.6 °FAverage 2020–2025
50.9 °FAverage High 2020–2025
59.4 °F