Portsmouth Weather Forecast

    • 38
    • 50

    Rain Likely

    • 16
    • 46

    Slight Chance Rain

    • 22
    • 31

    Partly Sunny

    • 27
    • 40

    Chance Rain/Snow

    • 19
    • 36

    Slight Chance Snow

    • 14
    • 32

    Partly Sunny

    • 10
    • 25

    Partly Sunny

Today 14 Jan Coastal Rockingham

Mostly cloudy. Highs in the upper 40s. South Winds around 10 Mph with Gusts up to 25 Mph.

Tonight 14 Jan Coastal Rockingham

Cloudy with a 50 percent chance of Showers. Areas of fog this evening. Areas of fog after midnight. Lows in the upper 30s. Light and variable Winds.

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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

    28.9 °F

  • Highest 10 January, 2026

    48.7 °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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