New Athens Weather Forecast

    • 69
    • 98

    Slight Chance Thunderstorms

    • 68
    • 98

    Slight Chance Thunderstorms

    • 66
    • 96

    Slight Chance Thunderstorms

    • 66
    • 96

    Mostly Sunny

    • 66
    • 95

    Partly Sunny

    • 65
    • 91

    Slight Chance Thunderstorms

Today 13 Sep St. Clair

Sunny. A slight chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the upper 90s. Southwest Winds around 5 Mph. Chance of rain 20 percent.

Tonight 13 Sep St. Clair

Mostly clear. Lows around 70. South Winds around 5 Mph.

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New Athens Temperature Statistics

September Temperature

Belleville, Scott AFB/MidAmerica Airport (15.5 miles)

  • Lowest 8 September, 2025

    44.6 °F

  • Average September

    66.4 °F

  • Highest 10 September, 2025

    89.4 °F

Climate (2020–Present)

Belleville, Scott AFB/MidAmerica Airport (15.5 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.2 °F

  • Average High 2020–2025

    67.3 °F
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