Mount Vernon Weather Forecast

    • 55
    • 68

    Slight Chance Rain Showers

    • 54
    • 72

    Partly Sunny

    • 61
    • 73

    Rain Showers

    • 62
    • 71

    Rain Showers Likely

    • 56
    • 70

    Chance Rain Showers

    • 53
    • 65

    Slight Chance Rain Showers

Today 27 Sep Linn

Mostly cloudy. A slight chance of Showers this morning. Highs in the upper 60s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

Tonight 27 Sep Linn

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the mid 50s. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mount Vernon Temperature Statistics

September Temperature

Cedar Rapids Airport (15.5 miles)

  • Lowest 23 September, 2026

    49.6 °F

  • Average September

    70.3 °F

  • Highest 3 September, 2026

    94.6 °F

Climate (2021–2026)

Cedar Rapids Airport (15.5 miles)

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  • Average Low 2021–2026

    40.7 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    61.5 °F
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