Monticello Weather Forecast

    • 70
    • 81

    Slight Chance Thunderstorms

    • 75
    • 90

    Mostly Sunny

    • 77
    • 92

    Mostly Sunny

    • 75
    • 94

    Mostly Sunny

    • 76
    • 94

    Mostly Sunny

Today 27 Jun Lewis

Areas of fog in the morning. Mostly cloudy. Highs in the lower 80s. Northeast Winds around 5 Mph, becoming southeast in the afternoon.

Tonight 27 Jun Lewis

Mostly cloudy with a chance of Showers and Thunderstorms. Lows around 70. Southeast Winds 5 to 10 Mph. Chance of rain 50 percent.

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Monticello Temperature Statistics

June Temperature

Keokuk Municipal Airport (28 miles)

  • Lowest 15 June, 2026

    51.8 °F

  • Average June

    71.3 °F

  • Highest 6 June, 2026

    87.8 °F

Climate (2021–2026)

Keokuk Municipal Airport (28 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    63.4 °F
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