Portsmouth Weather Forecast

    • 16
    • 24

    Blustery

    • 18
    • 31

    Mostly Cloudy

    • 9
    • 28

    Slight Chance Snow Showers

    • 15
    • 26

    Partly Sunny

    • 9
    • 27

    Partly Sunny

    • 11
    • 24

    Partly Sunny

Today 30 Dec Coastal Rockingham

Partly sunny. Colder with Highs in the mid 20s. West Winds 15 to 20 Mph with Gusts up to 40 Mph.

Tonight 30 Dec Coastal Rockingham

Partly cloudy. Lows around 16. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

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Portsmouth Temperature Statistics

December Temperature

Pease Air Force Base / Portsmouth (3.1 miles)

  • Lowest 5 December, 2025

    6.8 °F

  • Average December

    27.6 °F

  • Highest 19 December, 2025

    55.4 °F

Climate (2020–Present)

Pease Air Force Base / Portsmouth (3.1 miles)

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  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    59.3 °F
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