Clayton Weather Forecast

    • 40
    • 76

    Mostly Sunny

    • 32
    • 67

    Slight Chance Rain

    • 33
    • 47

    Rain/Snow

    • 38
    • 44

    Rain

    • 49
    • 59

    Rain Likely

    • 51
    • 65

    Rain Likely

    • 53
    • 68

    Chance Rain

Today 27 Feb St. Louis

Sunny and not as cool. Near steady temperature in the lower 70s. Southwest Winds 15 to 20 Mph.

Tonight 27 Feb St. Louis

Mostly clear. Lows in the upper 30s. West Winds 5 to 10 Mph, becoming north after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clayton Temperature Statistics

February Temperature

St. Louis Lambert International Airport (8.1 miles)

  • Lowest 1 February, 2026

    4.6 °F

  • Average February

    40.1 °F

  • Highest 18 February, 2026

    73.7 °F

Climate (2021–Present)

St. Louis Lambert International Airport (8.1 miles)

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  • Average Low 2021–2026

    50.5 °F

  • Average 2021–2026

    60 °F

  • Average High 2021–2026

    69.4 °F
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