Deer Plain Weather Forecast

    • 70
    • 97

    Hot

    • 70
    • 97

    Slight Chance Thunderstorms

    • 68
    • 94

    Slight Chance Thunderstorms

    • 67
    • 95

    Slight Chance Thunderstorms

    • 66
    • 94

    Partly Sunny

    • 65
    • 90

    Slight Chance Rain Showers

Today 13 Sep Calhoun

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

Tonight 13 Sep Calhoun

Mostly clear. Near steady temperature in the upper 60s. Southeast Winds 5 to 10 Mph.

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Deer Plain Temperature Statistics

September Temperature

St. Charles, St. Charles County Smartt Airport (5 miles)

  • Lowest 7 September, 2025

    48 °F

  • Average September

    66.1 °F

  • Highest 10 September, 2025

    87.1 °F

Climate (2020–Present)

St. Charles, St. Charles County Smartt Airport (5 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.6 °F

  • Average High 2020–2025

    68.3 °F
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