Portsmouth Weather Forecast

    • 20
    • 31

    Snow

    • 7
    • 30

    Chance Snow

    • 13
    • 25

    Mostly Sunny

    • 15
    • 27

    Slight Chance Snow

    • 9
    • 27

    Partly Sunny

    • 15
    • 25

    Slight Chance Snow

    • 23
    • 34

    Slight Chance Snow

Today 31 Dec Coastal Rockingham

Mostly cloudy. Highs in the lower 30s. Southwest Winds around 10 Mph with Gusts up to 25 Mph.

Tonight 31 Dec Coastal Rockingham

Mostly cloudy. A slight chance of snow in the Evening, then snow after midnight. Snow accumulation around an inch. Lows around 20. Light and variable Winds. Chance of snow 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portsmouth Temperature Statistics

December Temperature

Pease Air Force Base / Portsmouth (3.1 miles)

  • Lowest 5 December, 2025

    6.8 °F

  • Average December

    27.9 °F

  • Highest 19 December, 2025

    55.4 °F

Climate (2021–Present)

Pease Air Force Base / Portsmouth (3.1 miles)

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  • Average Low 2021–2025

    42.5 °F

  • Average 2021–2025

    50.8 °F

  • Average High 2021–2025

    59.3 °F
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