National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Strong to Severe Thunderstorms in the East; Heat in the Central and Western U.S.

Strong to potentially severe thunderstorms with damaging wind gusts are forecast Thursday from parts of New England into the Mid Atlantic and Carolinas. Significant heat will expand across the West and Central Plains through Friday, potentially breaking daily high temperature records. Dangerous heat will then build into the Eastern U.S. this weekend through much of next week. Read More >

Hazardous Weather Conditions

Current conditions at

Clinton Municipal Airport (KCWI)

Lat: 41.83°NLon: 90.33°WElev: 696ft.

Fair

69°F

21°C

Humidity 81%
Wind Speed SW 7 mph
Barometer 29.96 in (1014.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 19 Jun 10:56 pm CDT
Extended Forecast for

Savanna IL

  • Tonight

    Tonight: A 10 percent chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 65. South wind around 5 mph.

    Low: 65 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms, mainly before 1pm. High near 87. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 87 °F

    T-storms then
    Chance
    T-storms and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 94. Heat index values as high as 108. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 76.

    Low: 76 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 95.

    High: 95 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 75.

    Low: 75 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 10 percent chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 65. South wind around 5 mph.
Friday
Showers and thunderstorms, mainly before 1pm. High near 87. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Mostly clear, with a low around 75. South wind around 10 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 94. Heat index values as high as 108. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Saturday Night
Clear, with a low around 76.
Sunday
Sunny and hot, with a high near 95.
Sunday Night
Clear, with a low around 75.
Monday
Sunny and hot, with a high near 96.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 40%.
Tuesday
A 50 percent chance of showers. Mostly sunny, with a high near 92.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Wednesday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 90. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Thursday
Showers likely. Mostly sunny, with a high near 88. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Savanna IL
 42.07°N 90.13°W (Elev. 591 ft)
Last Update:
11:47 pm CDT Jun 19, 2025
Forecast Valid:
11pm CDT Jun 19, 2025-6pm CDT Jun 26, 2025
 
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