Weldon Spring Weather Forecast

    • 41
    • 57

    Mostly Sunny

    • 58
    • 71

    Mostly Cloudy

    • 67
    • 84

    Slight Chance Thunderstorms

    • 46
    • 85

    Chance Thunderstorms

    • 40
    • 56

    Rain Likely

    • 44
    • 57

    Rain Likely

Today 28 Mar St. Charles

Widespread frost this morning. Sunny. Highs in the mid 50s. Northeast Winds around 5 Mph, becoming southeast this afternoon.

Tonight 28 Mar St. Charles

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 30s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Weldon Spring Temperature Statistics

March Temperature

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

  • Lowest 17 March, 2026

    16.6 °F

  • Average March

    53.7 °F

  • Highest 26 March, 2026

    93 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    57.2 °F

  • Average High 2021–2026

    68.6 °F
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