Severe Thunderstorms in the Central Plains and Lower Missouri Valley; Heat Continues in the Southeast and Southwest

Severe thunderstorms capable of large hail and damaging wind gusts are forecast to impact the central Plains into the Lower Missouri Valley through this afternoon. Dangerous heat persists across the southern Plains, Southeast U.S. and Puerto Rico this week, and will return to the Southwest today. Read More >

Hazardous Weather Conditions

Current conditions at

Dubuque Regional Airport (KDBQ)

Lat: 42.4°NLon: 90.71°WElev: 1040ft.

Fair

64°F

18°C

Humidity 90%
Wind Speed S 5 mph
Barometer 30.02 in (1016.2 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 18 Aug 6:53 am CDT
Extended Forecast for

Monticello IA

  • Today

    Today: A chance of showers, with thunderstorms also possible after 9am.  Mostly cloudy, with a high near 79. South wind 5 to 10 mph becoming west in the afternoon.  Chance of precipitation is 40%.

    High: 79 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Mostly cloudy, with a low around 62. West wind around 5 mph becoming calm  in the evening.

    Low: 62 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 79. Calm wind becoming north around 5 mph.

    High: 79 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 1am.  Partly cloudy, with a low around 61.

    Low: 61 °F

    Mostly Clear
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 63.

    Low: 63 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

Today
A chance of showers, with thunderstorms also possible after 9am. Mostly cloudy, with a high near 79. South wind 5 to 10 mph becoming west in the afternoon. Chance of precipitation is 40%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 62. West wind around 5 mph becoming calm in the evening.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 79. Calm wind becoming north around 5 mph.
Wednesday Night
Partly cloudy, with a low around 58. Calm wind.
Thursday
Sunny, with a high near 79.
Thursday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 61.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 81.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Mostly sunny, with a high near 76.
Sunday Night
Mostly cloudy, with a low around 60.
Monday
Mostly sunny, with a high near 77.
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ABOUT THIS FORECAST

 
Point Forecast:
Monticello IA
 42.25°N 91.18°W (Elev. 804 ft)
5:31 am CDT Aug 18, 2026
7am CDT Aug 18, 2026-6pm CDT Aug 24, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database