Blairsville Weather Forecast

    • 67
    • 82

    Chance Rain Showers

    • 66
    • 85

    Chance Thunderstorms

    • 69
    • 88

    Mostly Sunny

    • 71
    • 89

    Chance Thunderstorms

    • 64
    • 86

    Rain Showers Likely

    • 58
    • 78

    Chance Thunderstorms

Today 15 May Williamson

Mostly sunny. Highs in the lower 80s. South Winds 5 to 10 Mph, increasing to around 15 Mph this afternoon.

Tonight 15 May Williamson

Mostly cloudy with a slight chance of Showers and Thunderstorms. Not as cool. More humid with Lows in the upper 60s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

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Blairsville Temperature Statistics

May Temperature

Southern Illinois Airport (6.8 miles)

  • Lowest 3 May, 2026

    37.7 °F

  • Average May

    60.4 °F

  • Highest 4 May, 2026

    81.6 °F

Climate (2021–Present)

Southern Illinois Airport (6.8 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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