Lake Girardeau Weather Forecast

    • 74
    • 97

    Hot

    • 73
    • 99

    Hot

    • 67
    • 95

    Mostly Sunny

    • 66
    • 91

    Sunny

    • 71
    • 95

    Sunny

    • 72
    • 98

    Hot

    • 67
    • 94

    Slight Chance Thunderstorms

Today 4 Sep Cape Girardeau

Sunny with a slight chance of Showers and Thunderstorms. Hot. Near steady temperature in the upper 90s. South Winds around 5 Mph. Chance of rain 20 percent. Highest heat index Readings heat index Readings up to 106.

Tonight 4 Sep Cape Girardeau

Mostly clear. Lows in the mid 70s. Southwest Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Girardeau Temperature Statistics

September Temperature

Cape Girardeau, Cape Girardeau Regional Airport (14.9 miles)

  • Lowest 1 September, 2026

    69.7 °F

  • Average September

    84.1 °F

  • Highest 1 September, 2026

    97.6 °F

Climate (2021–2026)

Cape Girardeau, Cape Girardeau Regional Airport (14.9 miles)

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  • Average Low 2021–2026

    49 °F

  • Average 2021–2026

    59.7 °F

  • Average High 2021–2026

    70.5 °F
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