Cass County, IL Weather Forecast
County weather hub
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.
Showers and thunderstorms before 4pm. Cloudy, with a high near 62. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
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
- Apr 10 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 7:00 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Cass County
Tuesday looks like the warmest upcoming period in Cass County at 84 degrees F.
Friday Night is the coolest period ahead with temperatures near 44 degrees F.
The strongest winds are forecast for Sunday at about 14 to 21 mph S.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 7:00 PM CDT
- Coverage
- 6 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
Partly cloudy, with a low around 44. Northeast wind around 8 mph. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers after 7am. Mostly cloudy, with a high near 66. East southeast wind around 12 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 7pm. Mostly cloudy, with a low around 59. South southeast wind 10 to 14 mph, with gusts as high as 23 mph.
A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 76. South wind 14 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Chance of precipitation is 50%.
A chance of rain showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 82. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Showers and thunderstorms likely. Partly sunny, with a high near 84.
Showers and thunderstorms likely. Mostly cloudy, with a low around 62.
Showers and thunderstorms likely. Mostly cloudy, with a high near 77.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Apr 10
|
Showers And Thunderstorms
|
62°F |
10 mph
NW
|
|
Friday Night
Apr 10
|
Partly Cloudy
|
44°F |
8 mph
NE
|
|
Saturday
Apr 11
|
Chance Rain Showers
|
66°F |
12 mph
ESE
|
|
Saturday Night
Apr 11
|
Slight Chance Rain Showers then Mostly Cloudy
|
59°F |
10 to 14 mph
SSE
|
|
Sunday
Apr 12
|
Chance Showers And Thunderstorms
|
76°F |
14 to 21 mph
S
|
|
Sunday Night
Apr 12
|
Chance Showers And Thunderstorms
|
62°F |
15 to 18 mph
SSW
|
|
Monday
Apr 13
|
Chance Showers And Thunderstorms
|
82°F |
14 to 17 mph
SSW
|
|
Monday Night
Apr 13
|
Chance Showers And Thunderstorms
|
66°F |
16 mph
SSW
|
|
Tuesday
Apr 14
|
Showers And Thunderstorms Likely
|
84°F |
14 to 18 mph
SSW
|
|
Tuesday Night
Apr 14
|
Showers And Thunderstorms Likely
|
62°F |
16 mph
SSW
|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
77°F |
14 to 17 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
54°F |
9 to 14 mph
SW
|
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.
