Lake Murphysboro Weather Forecast

    • 70
    • 82

    Rain Showers Likely

    • 61
    • 86

    Rain Showers

    • 55
    • 71

    Chance Rain Showers

    • 59
    • 75

    Mostly Cloudy

    • 62
    • 77

    Chance Rain Showers

    • 63
    • 81

    Chance Thunderstorms

    • 65
    • 82

    Chance Thunderstorms

Today 18 May Jackson

Showers and Thunderstorms likely. Near steady temperature around 80. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 18 May Jackson

Mostly cloudy with a chance of Showers and Thunderstorms this Evening, then partly cloudy after midnight. Lows around 70. Southeast Winds 10 to 15 Mph, becoming south after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Murphysboro Temperature Statistics

May Temperature

Southern Illinois Airport (7.5 miles)

  • Lowest 3 May, 2026

    37.7 °F

  • Average May

    61.7 °F

  • Highest 15 May, 2026

    82.7 °F

Climate (2021–Present)

Southern Illinois Airport (7.5 miles)

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  • Average Low 2021–2026

    48.1 °F

  • Average 2021–2026

    58.6 °F

  • Average High 2021–2026

    69.3 °F
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