Weldon Spring Weather Forecast

    • 65
    • 87

    Sunny

    • 40
    • 85

    Partly Sunny

    • 41
    • 58

    Partly Sunny

    • 43
    • 62

    Slight Chance Thunderstorms

    • 53
    • 69

    Partly Sunny

    • 40
    • 80

    Chance Rain

Today 21 Mar St. Charles

Sunny. Highs in the mid 80s. East Winds around 5 Mph, becoming south in the afternoon.

Tonight 21 Mar St. Charles

Mostly clear. Not as cool with Lows in the lower 60s. 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 16 March, 2026

    20.6 °F

  • Average March

    50.8 °F

  • Highest 10 March, 2026

    86.6 °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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