Weldon Spring Weather Forecast

    • 67
    • 85

    Rain Showers

    • 65
    • 74

    Rain Showers Likely

    • 64
    • 79

    Slight Chance Rain Showers

    • 65
    • 83

    Mostly Sunny

    • 68
    • 86

    Mostly Sunny

    • 70
    • 89

    Mostly Sunny

Today 31 Jul St. Charles

Partly sunny with a chance of Showers and Thunderstorms. Highs in the mid 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 31 Jul St. Charles

Showers with a chance of Thunderstorms in the Evening, then a slight chance of Showers after midnight. Humid with Lows in the upper 60s. South Winds 10 to 15 Mph, becoming southwest 5 to 10 Mph after midnight. Chance of rain near 100 percent.

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  • Temperature Real-Time

Weldon Spring Temperature Statistics

July Temperature

St. Louis, Spirit Of St. Louis Airport (3.7 miles)

  • Lowest 23 July, 2026

    61.6 °F

  • Average July

    80.3 °F

  • Highest 26 July, 2026

    98.7 °F

Climate (2021–2026)

St. Louis, Spirit Of St. Louis Airport (3.7 miles)

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    57.5 °F

  • Average High 2021–2026

    68.9 °F
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