Mount Pleasant Weather Forecast

    • 55
    • 75

    Chance Thunderstorms

    • 66
    • 83

    Chance Thunderstorms

    • 65
    • 86

    Chance Thunderstorms

    • 71
    • 91

    Chance Thunderstorms

    • 72
    • 92

    Rain Showers Likely

    • 64
    • 88

    Rain Showers Likely

Today 14 May St. Louis City

Sunny. Near steady temperature in the lower 70s. Southeast Winds 5 to 10 Mph.

Tonight 14 May St. Louis City

Partly cloudy this Evening, then mostly cloudy with a chance of Showers and Thunderstorms after midnight. Lows in the mid 50s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Pleasant Temperature Statistics

May Temperature

St. Louis Downtown Airport (4.3 miles)

  • Lowest 7 May, 2026

    39.7 °F

  • Average May

    60.6 °F

  • Highest 12 May, 2026

    82.9 °F

Climate (2021–Present)

St. Louis Downtown Airport (4.3 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    69.3 °F
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