Monticello Weather Forecast

    • 73
    • 87

    Thunderstorms

    • 72
    • 91

    Rain Showers Likely

    • 75
    • 92

    Slight Chance Thunderstorms

    • 74
    • 93

    Slight Chance Thunderstorms

    • 69
    • 91

    Chance Rain Showers

    • 66
    • 84

    Slight Chance Thunderstorms

    • 68
    • 85

    Partly Sunny

Today 12 Aug Lewis

Mostly cloudy with scattered Showers and Thunderstorms. Highs in the upper 80s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 12 Aug Lewis

Partly cloudy. Scattered Showers and Thunderstorms after midnight. Lows in the lower 70s. East Winds around 5 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Monticello Temperature Statistics

August Temperature

Keokuk Municipal Airport (28 miles)

  • Lowest 3 August, 2026

    62.6 °F

  • Average August

    74.7 °F

  • Highest 4 August, 2026

    87.8 °F

Climate (2021–2026)

Keokuk Municipal Airport (28 miles)

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  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    54 °F

  • Average High 2021–2026

    63.6 °F
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