Blairsville Weather Forecast

    • 69
    • 86

    Sunny

    • 73
    • 96

    Mostly Sunny

    • 73
    • 95

    Mostly Sunny

    • 72
    • 96

    Mostly Sunny

    • 72
    • 94

    Mostly Sunny

    • 71
    • 94

    Mostly Sunny

    • 67
    • 90

    Slight Chance Thunderstorms

Today 14 Sep Williamson

Sunny. Near steady temperature in the mid 80s. East Winds 5 to 10 Mph.

Tonight 14 Sep Williamson

Clear. Lows in the upper 60s. Southeast Winds 5 to 10 Mph.

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Blairsville Temperature Statistics

September Temperature

Southern Illinois Airport (6.8 miles)

  • Lowest 8 September, 2026

    58.6 °F

  • Average September

    82.2 °F

  • Highest 5 September, 2026

    103.6 °F

Climate (2021–2026)

Southern Illinois Airport (6.8 miles)

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  • Average Low 2021–2026

    48.3 °F

  • Average 2021–2026

    58.9 °F

  • Average High 2021–2026

    69.5 °F
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