Northumberland Weather Forecast

    • 5
    • 14

    Mostly Cloudy

    • 13
    • 25

    Mostly Cloudy

    • 12
    • 36

    Mostly Cloudy

    • 36
    • 42

    Rain

    • 6
    • 49

    Chance Rain Showers

    • 15
    • 24

    Chance Snow Showers

    • 8
    • 33

    Chance Snow Showers

Today 15 Dec Southern Coos

Mostly cloudy with a 20 percent chance of snow. Highs around 12. West Winds 10 to 15 Mph with Gusts up to 30 Mph. Wind chill Values as low as 6 below.

Tonight 15 Dec Southern Coos

Mostly cloudy. A slight chance of snow this evening. Lows around 5 above. West Winds around 10 Mph with Gusts up to 25 Mph this Evening, becoming light and variable. Chance of snow 20 percent. Wind chill Values as low as 4 below.

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Northumberland Temperature Statistics

December Temperature

Whitefield - Mount Washington Regional Airport (13 miles)

  • Lowest 9 December, 2025

    -18.9 °F

  • Average December

    15.7 °F

  • Highest 1 December, 2025

    35.1 °F

Climate (2020–Present)

Whitefield - Mount Washington Regional Airport (13 miles)

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  • Average Low 2020–2025

    32.6 °F

  • Average 2020–2025

    44.1 °F

  • Average High 2020–2025

    55.4 °F
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