Jones-Confluence Point State Park Weather Forecast

    • 67
    • 93

    Rain Showers Likely

    • 61
    • 80

    Rain Showers Likely

    • 55
    • 74

    Mostly Cloudy

    • 55
    • 75

    Partly Sunny

    • 59
    • 77

    Mostly Cloudy

    • 59
    • 80

    Partly Sunny

Today 20 Sep St. Charles

Partly sunny. Highs in the lower 90s. West Winds 5 to 10 Mph.

Tonight 20 Sep St. Charles

Showers likely with a chance of Thunderstorms. Lows in the upper 60s. North Winds 5 to 10 Mph. Chance of rain 70 percent.

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Jones-Confluence Point State Park Temperature Statistics

September Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 8 September, 2026

    59 °F

  • Average September

    77.4 °F

  • Highest 5 September, 2026

    100.4 °F

Climate (2021–2026)

St. Louis Regional Airport (6.2 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    66.7 °F
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