St Charles Weather Forecast

    • 64
    • 81

    Increasing Clouds

    • 66
    • 82

    Chance Thunderstorms

    • 67
    • 85

    Thunderstorms

    • 69
    • 82

    Thunderstorms Likely

    • 73
    • 88

    Slight Chance Thunderstorms

    • 76
    • 94

    Mostly Sunny

Today 23 Jun St. Charles

Sunny. Not as cool with Highs in the lower 80s. Northeast Winds around 5 Mph.

Tonight 23 Jun St. Charles

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 60s. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St Charles Temperature Statistics

June Temperature

St. Louis Lambert International Airport (7.5 miles)

  • Lowest 3 June, 2026

    56.6 °F

  • Average June

    76.3 °F

  • Highest 17 June, 2026

    93.7 °F

Climate (2021–2026)

St. Louis Lambert International Airport (7.5 miles)

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  • Average Low 2021–2026

    50.6 °F

  • Average 2021–2026

    60.1 °F

  • Average High 2021–2026

    69.7 °F
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