Portsmouth Weather Forecast

    • 18
    • 46

    Rain Likely

    • 15
    • 24

    Partly Sunny

    • 17
    • 32

    Chance Snow

    • 11
    • 26

    Mostly Sunny

    • 15
    • 26

    Mostly Sunny

    • 12
    • 30

    Partly Sunny

    • 12
    • 26

    Partly Sunny

Today 29 Dec Coastal Rockingham

Rain. Areas of fog. Highs in the mid 40s. South Winds around 10 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

Tonight 29 Dec Coastal Rockingham

Partly cloudy with a slight chance of rain in the Evening, then mostly clear after midnight. Lows around 19. West Winds 10 to 15 Mph. Gusts up to 30 Mph, increasing to 40 Mph after midnight. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • 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

    27.8 °F

  • Highest 19 December, 2025

    55.4 °F

Climate (2020–Present)

Pease Air Force Base / Portsmouth (3.1 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    42.5 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    59.3 °F
Get WillyWeather+ to remove ads