Crystal City Weather Forecast

    • 64
    • 96

    Chance Thunderstorms

    • 61
    • 89

    Chance Thunderstorms

    • 64
    • 89

    Chance Rain Showers

    • 64
    • 88

    Chance Thunderstorms

    • 63
    • 86

    Chance Thunderstorms

    • 61
    • 87

    Slight Chance Thunderstorms

Today 18 Sep Jefferson

Sunny, hot with Highs in the mid 90s. Southeast Winds around 5 Mph.

Tonight 18 Sep Jefferson

Partly cloudy in the Evening, then mostly cloudy with a slight chance of Showers and Thunderstorms after midnight. Lows in the mid 60s. West Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Crystal City Temperature Statistics

September Temperature

St. Louis Downtown Airport (26.7 miles)

  • Lowest 8 September, 2025

    44.1 °F

  • Average September

    71.3 °F

  • Highest 14 September, 2025

    96.1 °F

Climate (2020–Present)

St. Louis Downtown Airport (26.7 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.8 °F

  • Average High 2020–2025

    68.5 °F
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