Herrin Weather Forecast

    • 75
    • 93

    Chance Thunderstorms

    • 74
    • 92

    Chance Thunderstorms

    • 75
    • 88

    Thunderstorms Likely

    • 77
    • 92

    Chance Thunderstorms

    • 76
    • 92

    Chance Thunderstorms

    • 77
    • 94

    Chance Thunderstorms

    • 78
    • 96

    Slight Chance Thunderstorms

Today 16 Jul Williamson

Sunny with a chance of Showers and Thunderstorms. Near steady temperature around 90. Southwest Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 16 Jul Williamson

Mostly clear. Lows in the mid 70s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Herrin Temperature Statistics

July Temperature

Marion - Williamson County Regional Airport (2.5 miles)

  • Lowest 2 July, 2025

    64.6 °F

  • Average July

    76.1 °F

  • Highest 5 July, 2025

    91.4 °F

Climate (2020–Present)

Marion - Williamson County Regional Airport (2.5 miles)

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  • Average Low 2020–2025

    47.2 °F

  • Average 2020–2025

    55.5 °F

  • Average High 2020–2025

    67.4 °F
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