Thornton Weather Forecast

    • 54
    • 74

    Chance Thunderstorms

    • 56
    • 82

    Chance Rain Showers

    • 59
    • 86

    Mostly Cloudy

    • 57
    • 82

    Rain Showers Likely

    • 53
    • 81

    Slight Chance Rain Showers

    • 57
    • 84

    Mostly Sunny

Today 30 Jul Northern Grafton

Patchy fog this morning. Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms this afternoon. Highs around 70. Light and variable Winds. Chance of rain 50 percent.

Tonight 30 Jul Northern Grafton

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms in the Evening, then a slight chance of Showers after midnight. Patchy fog in the Evening, then Areas of fog after midnight. Lows in the mid 50s. Light and variable Winds. Chance of rain 40 percent.

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Thornton Temperature Statistics

July Temperature

Plymouth Municipal Airport (8.7 miles)

  • Lowest 24 July, 2026

    44.6 °F

  • Average July

    68.9 °F

  • Highest 2 July, 2026

    93.2 °F

Climate (2021–2026)

Plymouth Municipal Airport (8.7 miles)

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  • Average Low 2021–2026

    36.2 °F

  • Average 2021–2026

    46.4 °F

  • Average High 2021–2026

    57 °F
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