Thornton Weather Forecast

    • -9
    • 5

    Cold

    • 8
    • 12

    Snow

    • 0
    • 21

    Snow

    • -2
    • 16

    Mostly Cloudy

    • -4
    • 17

    Partly Sunny

    • -1
    • 16

    Mostly Cloudy

    • 4
    • 17

    Mostly Cloudy

Today 24 Jan Northern Grafton

Mostly sunny. Highs around 1 above. Northwest Winds around 10 Mph with Gusts up to 20 Mph. Wind chill Values as low as 23 below.

Tonight 24 Jan Northern Grafton

Mostly clear in the Evening, then becoming partly cloudy. Cold with Lows around 12 below. Northwest Winds around 10 Mph with Gusts up to 20 Mph in the Evening, becoming light and variable. Wind chill Values as low as 23 below.

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Thornton Temperature Statistics

January Temperature

Plymouth Municipal Airport (8.7 miles)

  • Lowest 21 January, 2026

    -10.8 °F

  • Average January

    23.3 °F

  • Highest 10 January, 2026

    45 °F

Climate (2021–Present)

Plymouth Municipal Airport (8.7 miles)

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  • Average Low 2021–2026

    36.5 °F

  • Average 2021–2026

    46.6 °F

  • Average High 2021–2026

    57.1 °F
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