Mount Pleasant Weather Forecast

    • 67
    • 82

    Slight Chance Thunderstorms

    • 64
    • 82

    Slight Chance Thunderstorms

    • 65
    • 83

    Rain Showers Likely

    • 65
    • 86

    Chance Thunderstorms

    • 61
    • 83

    Mostly Sunny

    • 62
    • 83

    Mostly Sunny

Today 29 May St. Louis City

Mostly cloudy. Highs in the lower 80s. Southeast Winds 5 to 10 Mph.

Tonight 29 May St. Louis City

A slight chance of Thunderstorms in the evening. Mostly cloudy with a slight chance of Showers. Lows in the mid 60s. East Winds 5 to 10 Mph. Chance of rain 20 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

    65.2 °F

  • Highest 17 May, 2026

    89.7 °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

    69.2 °F
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