Knoxville, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Knoxville, IL in one place.
Showers and thunderstorms. Cloudy, with a high near 68. South southwest wind around 8 mph, with gusts as high as 16 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Knoxville, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 15, 2026 4:46 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Knoxville, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 4:46 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Knoxville
Wednesday looks like the warmest upcoming period in Knoxville at 75 degrees F.
Friday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Friday at about 17 to 22 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 4:46 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
A chance of rain showers before 10pm. Mostly cloudy, with a low around 45. West northwest wind 10 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
A chance of rain showers between 11am and 5pm. Partly sunny, with a high near 53. Northwest wind 17 to 22 mph, with gusts as high as 38 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Areas of frost after 3am. Partly cloudy, with a low around 34. North wind 5 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. North northwest wind 1 to 5 mph.
Areas of frost after 5am. Clear, with a low around 37. 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 41.
Mostly sunny, with a high near 69.
Partly cloudy, with a low around 45.
Mostly sunny, with a high near 74.
Mostly clear, with a low around 48.
Sunny, with a high near 75.
Mostly clear, with a low around 52.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Showers And Thunderstorms
|
68°F |
8 mph
SSW
|
|
Tonight
Oct 15
|
Chance Rain Showers then Mostly Cloudy
|
45°F |
10 to 20 mph
WNW
|
|
Friday
Oct 16
|
Chance Rain Showers
|
53°F |
17 to 22 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy then Areas Of Frost
|
34°F |
5 to 18 mph
N
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
57°F |
1 to 5 mph
NNW
|
|
Saturday Night
Oct 17
|
Clear then Areas Of Frost
|
37°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
|
41°F |
3 to 7 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
69°F |
2 to 6 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
45°F |
2 mph
ESE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
74°F |
0 to 3 mph
ESE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
48°F |
2 mph
ESE
|
|
Wednesday
Oct 21
|
Sunny
|
75°F |
2 to 6 mph
SE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
52°F |
5 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Knoxville.
