Knox County, IL Weather Forecast
County weather hub
Sunny
Compare major city weather across Knox County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 78. West wind 8 to 13 mph, with gusts as high as 22 mph.
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
- Apr 16 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 1:40 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Knox County
Friday looks like the warmest upcoming period in Knox County at 84 degrees F.
Saturday Night is the coolest period ahead with temperatures near 33 degrees F.
The strongest winds are forecast for Friday at about 6 to 21 mph SSE.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 1:40 PM CDT
- Coverage
- 7 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
Mostly clear, with a low around 55. South wind around 6 mph.
A chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. South southeast wind 6 to 21 mph, with gusts as high as 35 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms. Mostly cloudy. Low around 43, with temperatures rising to around 48 overnight. West southwest wind 14 to 18 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Rain showers likely before 1pm. Mostly sunny, with a high near 52. Northwest wind around 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Patchy frost after 3am. Mostly clear, with a low around 33. West northwest wind 6 to 15 mph, with gusts as high as 26 mph.
Patchy frost before 8am. Sunny, with a high near 56. West northwest wind 6 to 14 mph, with gusts as high as 24 mph.
Mostly clear, with a low around 36.
Sunny, with a high near 65.
Mostly clear, with a low around 49.
Mostly sunny, with a high near 74.
Mostly clear, with a low around 52.
A slight chance of rain showers after 1pm. Mostly sunny, with a high near 74.
A chance of rain showers. Partly cloudy, with a low around 52.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Apr 16
|
Sunny
|
78°F |
8 to 13 mph
W
|
|
Tonight
Apr 16
|
Mostly Clear
|
55°F |
6 mph
S
|
|
Friday
Apr 17
|
Partly Sunny then Chance Showers And Thunderstorms
|
84°F |
6 to 21 mph
SSE
|
|
Friday Night
Apr 17
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
43°F |
14 to 18 mph
WSW
|
|
Saturday
Apr 18
|
Rain Showers Likely
|
52°F |
17 mph
NW
|
|
Saturday Night
Apr 18
|
Mostly Clear then Patchy Frost
|
33°F |
6 to 15 mph
WNW
|
|
Sunday
Apr 19
|
Patchy Frost then Sunny
|
56°F |
6 to 14 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
36°F |
5 to 9 mph
NNE
|
|
Monday
Apr 20
|
Sunny
|
65°F |
5 to 13 mph
SSE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
49°F |
10 mph
SSW
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
74°F |
10 to 15 mph
SW
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
52°F |
7 to 12 mph
SW
|
|
Wednesday
Apr 22
|
Mostly Sunny then Slight Chance Rain Showers
|
74°F |
7 to 12 mph
SSW
|
|
Wednesday Night
Apr 22
|
Chance Rain Showers
|
52°F |
9 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.
