Cass County, IL Weather Forecast
County weather hub
Mostly Cloudy
Compare major city weather across Cass County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly cloudy. High near 86, with temperatures falling to around 80 in the afternoon. Southeast wind around 10 mph, with gusts as high as 16 mph.
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
- Oct 10 to Oct 16, 2026
- Latest sync
- Oct 10, 2026 6:47 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Cass County
Columbus Day looks like the warmest upcoming period in Cass County at 91 degrees F.
Friday Night is the coolest period ahead with temperatures near 42 degrees F.
The strongest winds are forecast for Friday at about 10 to 17 mph WNW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 10, 2026 6:47 PM CDT
- Coverage
- 7 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 53. Southeast wind 1 to 8 mph, with gusts as high as 16 mph.
Sunny, with a high near 85. South wind 0 to 3 mph.
Partly cloudy, with a low around 66. South wind 2 to 7 mph.
Sunny, with a high near 91. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Clear, with a low around 72. South southwest wind around 12 mph, with gusts as high as 21 mph.
Sunny, with a high near 88. West wind 7 to 10 mph, with gusts as high as 20 mph.
Showers and thunderstorms likely after 7pm. Partly cloudy, with a low around 64. Chance of precipitation is 60%.
Rain showers likely before 7am, then showers and thunderstorms likely. Partly sunny, with a high near 77. Chance of precipitation is 70%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 60.
Rain showers likely before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 73.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
A chance of rain showers before 1pm. Partly sunny, with a high near 67.
Partly cloudy, with a low around 42.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 10
|
Mostly Cloudy
|
86°F |
10 mph
SE
|
|
Tonight
Oct 10
|
Partly Cloudy
|
53°F |
1 to 8 mph
SE
|
|
Sunday
Oct 11
|
Sunny
|
85°F |
0 to 3 mph
S
|
|
Sunday Night
Oct 11
|
Partly Cloudy
|
66°F |
2 to 7 mph
S
|
|
Columbus Day
Oct 12
|
Sunny
|
91°F |
7 to 14 mph
SW
|
|
Monday Night
Oct 12
|
Clear
|
72°F |
12 mph
SSW
|
|
Tuesday
Oct 13
|
Sunny
|
88°F |
7 to 10 mph
W
|
|
Tuesday Night
Oct 13
|
Showers And Thunderstorms Likely
|
64°F |
6 mph
N
|
|
Wednesday
Oct 14
|
Showers And Thunderstorms Likely
|
77°F |
8 mph
NE
|
|
Wednesday Night
Oct 14
|
Showers And Thunderstorms Likely
|
60°F |
9 mph
ENE
|
|
Thursday
Oct 15
|
Showers And Thunderstorms Likely
|
73°F |
12 mph
ESE
|
|
Thursday Night
Oct 15
|
Chance Showers And Thunderstorms
|
52°F |
7 to 10 mph
SW
|
|
Friday
Oct 16
|
Chance Rain Showers
|
67°F |
10 to 17 mph
WNW
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
42°F |
10 to 14 mph
NW
|
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.
