Thornton Weather Forecast

    • 58
    • 82

    Mostly Sunny

    • 68
    • 90

    Mostly Sunny

    • 64
    • 89

    Rain Showers

    • 61
    • 84

    Slight Chance Thunderstorms

    • 61
    • 84

    Chance Rain Showers

    • 62
    • 86

    Slight Chance Rain Showers

Today 23 Jul Northern Grafton

Mostly sunny. Highs in the upper 70s. Light and variable Winds.

Tonight 23 Jul Northern Grafton

Mostly clear. Lows in the upper 50s. Light and variable Winds.

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Thornton Temperature Statistics

July Temperature

Plymouth Municipal Airport (8.7 miles)

  • Lowest 19 July, 2025

    45.5 °F

  • Average July

    71 °F

  • Highest 6 July, 2025

    91.4 °F

Climate (2020–Present)

Plymouth Municipal Airport (8.7 miles)

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  • Average Low 2020–2025

    36.8 °F

  • Average 2020–2025

    46.8 °F

  • Average High 2020–2025

    57.1 °F
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