Shelby County, IL Weather Forecast
County weather hub
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Compare major city weather across Shelby County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of showers and thunderstorms before 9pm, then showers and thunderstorms likely between 9pm and 3am. Mostly cloudy, with a low around 45. West wind 9 to 17 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Shelby 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 Shelby County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 15 to Oct 22, 2026
- Latest sync
- Oct 15, 2026 8:52 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Shelby County
Thursday looks like the warmest upcoming period in Shelby County at 80 degrees F.
Saturday Night is the coolest period ahead with temperatures near 33 degrees F.
The strongest winds are forecast for Friday at about 18 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 8:52 PM CDT
- Coverage
- 8 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 rain showers after 3pm. Partly sunny, with a high near 55. Northwest wind around 18 mph, with gusts as high as 31 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Partly cloudy, with a low around 36. North northwest wind 8 to 16 mph, with gusts as high as 26 mph. New rainfall amounts less than a tenth of an inch possible.
Sunny, with a high near 59. North northeast wind 2 to 7 mph.
Widespread frost after 3am. Clear, with a low around 33. Southeast wind around 1 mph.
Widespread frost before 8am. Sunny, with a high near 68. South southeast wind 2 to 7 mph.
Mostly clear, with a low around 36. South southeast wind around 3 mph.
Sunny, with a high near 71.
Partly cloudy, with a low around 41.
Mostly sunny, with a high near 76.
Mostly clear, with a low around 43.
Sunny, with a high near 79.
Mostly clear, with a low around 45.
Sunny, with a high near 80.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tonight
Oct 15
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
45°F |
9 to 17 mph
W
|
|
Friday
Oct 16
|
Partly Sunny then Chance Rain Showers
|
55°F |
18 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
36°F |
8 to 16 mph
NNW
|
|
Saturday
Oct 17
|
Sunny
|
59°F |
2 to 7 mph
NNE
|
|
Saturday Night
Oct 17
|
Clear then Widespread Frost
|
33°F |
1 mph
SE
|
|
Sunday
Oct 18
|
Widespread Frost then Sunny
|
68°F |
2 to 7 mph
SSE
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
36°F |
3 mph
SSE
|
|
Monday
Oct 19
|
Sunny
|
71°F |
1 to 5 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
41°F |
2 mph
SE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
76°F |
0 to 3 mph
ESE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
43°F |
2 mph
ESE
|
|
Wednesday
Oct 21
|
Sunny
|
79°F |
1 to 5 mph
ESE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
45°F |
2 mph
ESE
|
|
Thursday
Oct 22
|
Sunny
|
80°F |
2 to 6 mph
SSE
|
Major City Forecasts
Live forecast snapshots for major cities across Shelby County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Shelby County.
Largest mapped city population in this region: 3,967.
