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Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Clinton Municipal Airport (KCWI)

Lat: 41.83°NLon: 90.33°WElev: 696ft.

Mostly Cloudy

69°F

21°C

Humidity 78%
Wind Speed S 17 mph
Barometer 29.87 in (1011.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 18 May 10:56 pm CDT
Extended Forecast for

Delmar IA

  • Tonight

    Tonight: Occasional showers and thunderstorms, mainly before 4am. Low around 64. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 64 °F

    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly before 7am. Mostly cloudy, with a steady temperature around 67. Southwest wind around 15 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph.

    High: 67 °F

    Chance
    T-storms then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 44. Northwest wind 5 to 10 mph.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 65. Northeast wind 5 to 10 mph.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers likely. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers

Detailed Forecast

Tonight
Occasional showers and thunderstorms, mainly before 4am. Low around 64. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly before 7am. Mostly cloudy, with a steady temperature around 67. Southwest wind around 15 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 44. Northwest wind 5 to 10 mph.
Wednesday
Sunny, with a high near 65. Northeast wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
Partly sunny, with a high near 66.
Thursday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 46.
Friday
Showers likely. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 50.
Saturday
Partly sunny, with a high near 75.
Saturday Night
Mostly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 58.
Memorial Day
Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Delmar IA
 42°N 90.6°W (Elev. 794 ft)
Last Update:
10:02 pm CDT May 18, 2026
Forecast Valid:
11pm CDT May 18, 2026-6pm CDT May 25, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation