Cass County, IL Weather Forecast
County weather hub
Chance Showers And Thunderstorms
Compare major city weather across Cass County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of showers and thunderstorms after 7am. Partly sunny, with a high near 82.
County Weather Overview
This county weather page brings together forecast coverage for Cass County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 2 of 2 mapped cities in Cass County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- May 26 to May 28, 2026
- Latest sync
- May 21, 2026 9:34 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Cass County
Thursday looks like the warmest upcoming period in Cass County at 84 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Tuesday at about 6 to 10 mph E.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- May 21, 2026 9:34 PM CDT
- Coverage
- 3 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 83.
A chance of showers and thunderstorms before 1am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 64.
A chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 84.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Chance Showers And Thunderstorms
|
82°F |
6 to 10 mph
E
|
|
Tuesday Night
May 26
|
Chance Showers And Thunderstorms
|
63°F |
6 to 9 mph
ESE
|
|
Wednesday
May 27
|
Chance Showers And Thunderstorms
|
83°F |
10 mph
ESE
|
|
Wednesday Night
May 27
|
Chance Showers And Thunderstorms
|
64°F |
6 to 9 mph
ESE
|
|
Thursday
May 28
|
Chance Showers And Thunderstorms
|
84°F |
7 to 10 mph
ESE
|
Major City Forecasts
Live forecast snapshots for major cities across Cass County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Cass County.
Largest mapped city population in this region: 5,335.
