St Charles Weather Forecast

    • 68
    • 92

    Patchy Smoke

    • 69
    • 93

    Chance Thunderstorms

    • 65
    • 86

    Rain Showers

    • 62
    • 84

    Mostly Sunny

    • 65
    • 85

    Mostly Sunny

    • 68
    • 88

    Breezy

    • 65
    • 91

    Breezy

Today 28 Jul Gregory

Sunny. Patchy smoke. Highs in the lower 90s. East Winds 5 to 10 Mph.

Tonight 28 Jul Gregory

Mostly clear. Patchy smoke. Lows in the upper 60s. Southeast Winds 5 to 10 Mph, becoming south after midnight.

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St Charles Temperature Statistics

July Temperature

Winner, Bob Wiley Field Airport (42.9 miles)

  • Lowest 21 July, 2026

    60.1 °F

  • Average July

    78.9 °F

  • Highest 19 July, 2026

    104 °F

Climate (2021–2026)

Winner, Bob Wiley Field Airport (42.9 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    63.5 °F
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