Knox County, IL Weather Forecast
County weather hub
Partly Sunny then Chance Rain Showers
Compare major city weather across Knox County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of rain showers between noon and 5pm. Partly sunny, with a high near 54. Northwest wind 17 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Knox County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 5 of 5 mapped cities in Knox County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Oct 16 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 4:31 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Knox County
Wednesday looks like the warmest upcoming period in Knox County at 75 degrees F.
Friday Night is the coolest period ahead with temperatures near 33 degrees F.
The strongest winds are forecast for Friday at about 17 to 22 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 4:31 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KDVN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Areas of frost after 4am. Partly cloudy, with a low around 33. North wind 3 to 18 mph, with gusts as high as 30 mph. New rainfall amounts less than a tenth of an inch possible.
Widespread frost before 9am. Sunny, with a high near 57. Southwest wind 0 to 5 mph.
Areas of frost after 5am. Clear, with a low around 36. South southwest wind 2 to 6 mph.
Areas of frost before 8am. Sunny, with a high near 66. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Mostly clear, with a low around 40.
Mostly sunny, with a high near 68.
Partly cloudy, with a low around 44.
Mostly sunny, with a high near 73.
Mostly clear, with a low around 47.
Sunny, with a high near 75.
Mostly clear, with a low around 51.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Oct 16
|
Partly Sunny then Chance Rain Showers
|
54°F |
17 to 22 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy then Areas Of Frost
|
33°F |
3 to 18 mph
N
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
57°F |
0 to 5 mph
SW
|
|
Saturday Night
Oct 17
|
Clear then Areas Of Frost
|
36°F |
2 to 6 mph
SSW
|
|
Sunday
Oct 18
|
Areas Of Frost then Sunny
|
66°F |
6 to 13 mph
SSW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
40°F |
3 to 7 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
68°F |
2 to 6 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
44°F |
2 mph
ESE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
73°F |
0 to 3 mph
ESE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
47°F |
2 mph
ESE
|
|
Wednesday
Oct 21
|
Sunny
|
75°F |
1 to 6 mph
SE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
51°F |
5 mph
SSE
|
Major City Forecasts
Live forecast snapshots for major cities across Knox County.
Coverage
Forecast coverage currently spans 5 of 5 mapped cities in Knox County.
Largest mapped city population in this region: 29,803.
