Portsmouth Weather Forecast

    • 23
    • 41

    Clearing Late

    • 26
    • 37

    Partly Sunny

    • 32
    • 42

    Mostly Cloudy

    • 32
    • 45

    Chance Snow Showers

    • 17
    • 40

    Chance Snow Showers

    • 16
    • 28

    Partly Sunny

    • 21
    • 34

    Partly Sunny

Today 11 Jan Coastal Rockingham

Partly sunny. Highs in the lower 40s. West Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 11 Jan Coastal Rockingham

Partly cloudy this Evening, then clearing. Lows in the mid 20s. West Winds 10 to 15 Mph with Gusts up to 30 Mph, increasing to 15 to 25 Mph with Gusts up to 40 Mph after midnight.

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Portsmouth Temperature Statistics

January Temperature

Pease Air Force Base / Portsmouth (3.1 miles)

  • Lowest 5 January, 2026

    10.4 °F

  • Average January

    26 °F

  • Highest 9 January, 2026

    47.1 °F

Climate (2021–Present)

Pease Air Force Base / Portsmouth (3.1 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.3 °F
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