Monticello Weather Forecast

    • 76
    • 91

    Decreasing Clouds

    • 75
    • 96

    Mostly Sunny

    • 73
    • 93

    Chance Thunderstorms

    • 74
    • 91

    Chance Thunderstorms

    • 74
    • 92

    Slight Chance Thunderstorms

    • 75
    • 95

    Mostly Sunny

Today 22 Jul Lewis

Mostly cloudy. A slight chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Southeast Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 107 this afternoon.

Tonight 22 Jul Lewis

Partly cloudy. Humid with Lows in the mid 70s. Southeast Winds 5 to 10 Mph. Heat index Values up to 107 early in the evening.

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Monticello Temperature Statistics

July Temperature

Keokuk Municipal Airport (28 miles)

  • Lowest 1 July, 2025

    64.4 °F

  • Average July

    77.6 °F

  • Highest 11 July, 2025

    91.4 °F

Climate (2020–Present)

Keokuk Municipal Airport (28 miles)

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  • Average Low 2020–2025

    43.5 °F

  • Average 2020–2025

    53.1 °F

  • Average High 2020–2025

    62.6 °F
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