Deer Plain Weather Forecast

    • 38
    • 56

    Mostly Cloudy

    • 43
    • 64

    Mostly Cloudy

    • 60
    • 77

    Slight Chance Thunderstorms

    • 41
    • 89

    Rain Likely

    • 31
    • 51

    Slight Chance Rain

    • 38
    • 58

    Partly Sunny

Today 23 Mar Calhoun

Mostly sunny. Much cooler with Highs in the lower 50s. Northeast Winds 10 to 15 Mph. Gusts up to 30 Mph in the morning.

Tonight 23 Mar Calhoun

Mostly cloudy. Lows in the mid 30s. East Winds 5 to 10 Mph.

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  • Temperature Real-Time

Deer Plain Temperature Statistics

March Temperature

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

  • Lowest 17 March, 2026

    14.6 °F

  • Average March

    50.3 °F

  • Highest 20 March, 2026

    89.1 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    68.7 °F
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