St Marys Weather Forecast

    • 67
    • 83

    Increasing Clouds

    • 60
    • 80

    Rain Showers Likely

    • 61
    • 76

    Rain Showers Likely

    • 63
    • 85

    Rain Showers Likely

    • 56
    • 71

    Rain Showers Likely

    • 58
    • 67

    Chance Rain Showers

Today 11 Sep Warren

Sunny. Highs in the lower 80s. South Winds 5 to 10 Mph.

Tonight 11 Sep Warren

Mostly clear in the Evening, then partly cloudy with a chance of Showers with a slight chance of Thunderstorms after midnight. Humid with Lows in the upper 60s. South Winds 5 to 10 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St Marys Temperature Statistics

September Temperature

Des Moines International Airport (16.2 miles)

  • Lowest 7 September, 2026

    67.6 °F

  • Average September

    82.1 °F

  • Highest 1 September, 2026

    96.7 °F

Climate (2021–2026)

Des Moines International Airport (16.2 miles)

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    63.6 °F
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