Portsmouth Weather Forecast

    • 25
    • 34

    Freezing Rain

    • 20
    • 44

    Rain

    • 15
    • 25

    Mostly Cloudy

    • 14
    • 33

    Chance Snow

    • 10
    • 24

    Slight Chance Snow

    • 13
    • 26

    Partly Sunny

Today 28 Dec Coastal Rockingham

Partly sunny. Highs in the lower 30s. Light and variable Winds.

Tonight 28 Dec Coastal Rockingham

A chance of freezing rain in the Evening, then freezing rain and rain after midnight. Ice accumulation of a tenth to two Tenths of an inch. Lows in the mid 20s. Temperatures rising into the mid 30s after midnight. Light and variable Winds. Chance of precipitation near 100 percent.

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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

    28.3 °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

    42.6 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    59.3 °F
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