Deer Plain Weather Forecast

    • 72
    • 90

    Mostly Sunny

    • 73
    • 92

    Thunderstorms

    • 72
    • 90

    Thunderstorms Likely

    • 71
    • 88

    Chance Thunderstorms

    • 70
    • 89

    Slight Chance Thunderstorms

    • 71
    • 91

    Sunny

Today 8 Jul Calhoun

Sunny. Highs in the upper 80s. Southeast Winds around 5 Mph, becoming south around 5 Mph this afternoon.

Tonight 8 Jul Calhoun

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

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  • Temperature Real-Time

Deer Plain Temperature Statistics

July Temperature

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

  • Lowest 5 July, 2026

    69.7 °F

  • Average July

    82.4 °F

  • Highest 2 July, 2026

    97.6 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    68.9 °F
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