Cass County, IL Weather Forecast
County weather hub
Showers And Thunderstorms Likely
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 likely. Mostly cloudy, with a high near 85. North northeast wind around 3 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters 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
- Jul 10 to Jul 15, 2026
- Latest sync
- Jul 9, 2026 12:37 AM 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 89 degrees F.
Sunday Night is the coolest period ahead with temperatures near 66 degrees F.
The strongest winds are forecast for Saturday at about 7 mph NNE.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 9, 2026 12:37 AM 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
Showers and thunderstorms likely before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly cloudy, with a low around 68. East northeast wind around 3 mph. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
A chance of showers and thunderstorms. Some of the storms could produce heavy rain. Mostly sunny, with a high near 84. North northeast wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts between 1 and 2 inches possible.
A chance of showers and thunderstorms before 1am. Mostly clear, with a low around 67. Northeast wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers after 1pm. Sunny, with a high near 84.
A slight chance of rain showers before 7pm. Mostly clear, with a low around 66.
Sunny, with a high near 87.
Clear, with a low around 68.
Sunny, with a high near 89.
Clear, with a low around 70.
Sunny, with a high near 89.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 10
|
Showers And Thunderstorms Likely
|
85°F |
3 mph
NNE
|
|
Friday Night
Jul 10
|
Showers And Thunderstorms Likely
|
68°F |
3 mph
ENE
|
|
Saturday
Jul 11
|
Chance Showers And Thunderstorms
|
84°F |
7 mph
NNE
|
|
Saturday Night
Jul 11
|
Chance Showers And Thunderstorms
|
67°F |
6 mph
NE
|
|
Sunday
Jul 12
|
Sunny then Slight Chance Rain Showers
|
84°F |
7 mph
ENE
|
|
Sunday Night
Jul 12
|
Slight Chance Rain Showers then Mostly Clear
|
66°F |
2 to 6 mph
ENE
|
|
Monday
Jul 13
|
Sunny
|
87°F |
3 to 7 mph
ENE
|
|
Monday Night
Jul 13
|
Clear
|
68°F |
1 to 5 mph
ESE
|
|
Tuesday
Jul 14
|
Sunny
|
89°F |
5 mph
ENE
|
|
Tuesday Night
Jul 14
|
Clear
|
70°F |
3 mph
S
|
|
Wednesday
Jul 15
|
Sunny
|
89°F |
6 mph
WNW
|
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.
