Thornton Weather Forecast

    • 50
    • 77

    Becoming Sunny

    • 62
    • 83

    Rain Showers Likely

    • 52
    • 79

    Chance Thunderstorms

    • 48
    • 72

    Mostly Sunny

    • 53
    • 76

    Partly Sunny

    • 59
    • 81

    Chance Rain Showers

Today 18 Jul Northern Grafton

Partly sunny. Isolated Showers this morning. Highs in the mid 70s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 18 Jul Northern Grafton

Mostly clear. Lows in the upper 40s. Light and variable Winds.

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Thornton Temperature Statistics

July Temperature

Plymouth Municipal Airport (8.7 miles)

  • Lowest 5 July, 2025

    48.4 °F

  • Average July

    71.8 °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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