Grassy Point Weather Forecast

    • 54
    • 60

    Chance Rain Showers

    • 55
    • 58

    Rain Showers Likely

    • 58
    • 65

    Rain Showers Likely

    • 58
    • 70

    Chance Rain Showers

    • 55
    • 72

    Chance Rain Showers

    • 53
    • 69

    Partly Sunny

Today 18 Sep Carlton/South St. Louis

Cloudy with a chance of Showers with a slight chance of Thunderstorms. Much cooler with Highs in the lower 60s. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 40 percent.

Tonight 18 Sep Carlton/South St. Louis

Mostly cloudy. Near steady temperature around 60. Northeast Winds 5 to 10 Mph with Gusts up to 25 Mph.

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Grassy Point Temperature Statistics

September Temperature

Richard I. Bong Airport (3.7 miles)

  • Lowest 6 September, 2025

    36.9 °F

  • Average September

    56.7 °F

  • Highest 1 September, 2025

    79.5 °F

Climate (2020–Present)

Richard I. Bong Airport (3.7 miles)

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  • Average Low 2020–2025

    33.6 °F

  • Average 2020–2025

    43 °F

  • Average High 2020–2025

    51.2 °F
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