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.
Monticello Temperature Statistics
June Temperature
Keokuk Municipal Airport (28 miles)
Lowest 15 June, 2026
51.8 °FAverage June
71.3 °FHighest 6 June, 2026
87.8 °F
Climate (2021–2026)
Keokuk Municipal Airport (28 miles)
Average Low 2021–2026
43.9 °FAverage 2021–2026
53.7 °FAverage High 2021–2026
63.4 °F