Thornton Weather Forecast

    • -1
    • 21

    Becoming Sunny

    • 12
    • 24

    Mostly Cloudy

    • 21
    • 35

    Rain/Snow

    • 12
    • 32

    Slight Chance Snow

    • 11
    • 28

    Chance Snow

    • 9
    • 26

    Chance Snow

Today 8 Dec Northern Grafton

Mostly sunny. Highs around 14. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Wind chill Values as low as 9 below in the morning.

Tonight 8 Dec Northern Grafton

Partly cloudy with a 20 percent chance of snow. Lows around 8 above. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Wind chill Values as low as 7 below.

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Thornton Temperature Statistics

December Temperature

Plymouth Municipal Airport (8.7 miles)

  • Lowest 5 December, 2025

    -2.9 °F

  • Average December

    21.2 °F

  • Highest 1 December, 2025

    36.5 °F

Climate (2020–Present)

Plymouth Municipal Airport (8.7 miles)

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  • Average Low 2020–2025

    36.7 °F

  • Average 2020–2025

    46.7 °F

  • Average High 2020–2025

    57.1 °F
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