Portsmouth Weather Forecast

    • 16
    • 37

    Chance Snow

    • 7
    • 26

    Mostly Sunny

    • 24
    • 33

    Slight Chance Snow

    • 29
    • 42

    Chance Snow

    • 23
    • 41

    Chance Snow

    • 17
    • 36

    Chance Snow

Today 7 Dec Coastal Rockingham

Partly sunny. Highs in the mid 30s. Northwest Winds around 10 Mph in the Morning, becoming light and variable.

Tonight 7 Dec Coastal Rockingham

Partly cloudy. Lows in the lower 20s. West Winds around 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portsmouth Temperature Statistics

December Temperature

Pease Air Force Base / Portsmouth (3.1 miles)

  • Lowest 4 December, 2025

    12.7 °F

  • Average December

    30.5 °F

  • Highest 1 December, 2025

    40.3 °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

    50.9 °F

  • Average High 2020–2025

    59.4 °F
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