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

Heavy to Excessive Rainfall This Week from the Southwest into Central U.S.

Pacific tropical moisture wrapping into a storm over the southwest U.S. will continue a multi-day heavy rainfall event this week that will extend into the Midwest and southern Plains. Considerable flash flooding is possible across portions of New Mexico and west Texas today through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Illinois Valley Regional Airport (KVYS)

Lat: 41.35°NLon: 89.15°WElev: 650ft.

Fair

79°F

26°C

Humidity 34%
Wind Speed SW 7 mph
Barometer 30.01 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 29 Sep 12:41 pm CDT
Extended Forecast for

Tonica IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 80. South wind around 5 mph, with gusts as high as 15 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 64. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 64 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly between noon and 2pm. Mostly cloudy, with a high near 76. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers. Cloudy, with a low around 68. South wind around 5 mph, with gusts as high as 15 mph.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers likely, then showers and possibly a thunderstorm after 1pm. High near 76. South southwest wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.

    High: 76 °F

    Showers

  • Thursday Night

    Thursday Night: Showers. Low around 59. Chance of precipitation is 90%.

    Low: 59 °F

    Showers

  • Friday

    Friday: A 50 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 67.

    High: 67 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 80. South wind around 5 mph, with gusts as high as 15 mph.
Tonight
A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 64. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
Showers likely, mainly between noon and 2pm. Mostly cloudy, with a high near 76. South wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
A 40 percent chance of showers. Cloudy, with a low around 68. South wind around 5 mph, with gusts as high as 15 mph.
Thursday
Showers likely, then showers and possibly a thunderstorm after 1pm. High near 76. South southwest wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 80%.
Thursday Night
Showers. Low around 59. Chance of precipitation is 90%.
Friday
A 50 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 67.
Friday Night
Partly cloudy, with a low around 50.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 46.
Monday
Sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tonica IL
 41.21°N 89.06°W
Last Update:
11:46 am CDT Sep 29, 2026
Forecast Valid:
12pm CDT Sep 29, 2026-6pm CDT Oct 5, 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