Portsmouth Weather Forecast

    • 23
    • 27

    Snow Likely

    • 18
    • 42

    Partly Sunny

    • 1
    • 29

    Partly Sunny

    • 1
    • 13

    Partly Sunny

    • 10
    • 19

    Snow Likely

    • 8
    • 22

    Chance Snow

    • 9
    • 23

    Mostly Sunny

Today 21 Jan Coastal Rockingham

Mostly cloudy. Highs in the upper 20s. Southwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 21 Jan Coastal Rockingham

Cloudy with a 50 percent chance of snow. Lows in the lower 20s. South Winds 10 to 15 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portsmouth Temperature Statistics

January Temperature

Pease Air Force Base / Portsmouth (3.1 miles)

  • Lowest 5 January, 2026

    10.4 °F

  • Average January

    30.5 °F

  • Highest 14 January, 2026

    50.2 °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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