Knox, IL Weather Forecast
Local 7-day forecast
Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Knox, IL in one place.
A chance of rain showers after 7am. Mostly sunny, with a high near 77. West southwest wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Knox, 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: Apr 15, 2026 7:07 AM CDT.
The active forecast window currently covers Apr 16 to Apr 21, 2026 for Knox, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 16 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 7:07 AM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Knox
Friday looks like the warmest upcoming period in Knox at 83 degrees F.
Saturday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Saturday at about 14 to 18 mph W.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 7:07 AM 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
A slight chance of rain showers before 7pm. Mostly clear, with a low around 55. South southwest wind 2 to 7 mph. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 83. South wind 5 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 45. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Showers and thunderstorms likely. Partly sunny, with a high near 57. Chance of precipitation is 70%.
A chance of rain showers before 1am. Mostly clear, with a low around 35. Chance of precipitation is 30%.
Sunny, with a high near 54.
Mostly clear, with a low around 36.
Sunny, with a high near 66.
Mostly clear, with a low around 48.
Mostly sunny, with a high near 73.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 16
|
Chance Rain Showers
|
77°F |
9 to 13 mph
WSW
|
|
Thursday Night
Apr 16
|
Slight Chance Rain Showers then Mostly Clear
|
55°F |
2 to 7 mph
SSW
|
|
Friday
Apr 17
|
Mostly Sunny then Chance Showers And Thunderstorms
|
83°F |
5 to 17 mph
S
|
|
Friday Night
Apr 17
|
Showers And Thunderstorms
|
45°F |
15 mph
SSW
|
|
Saturday
Apr 18
|
Showers And Thunderstorms Likely
|
57°F |
14 to 18 mph
W
|
|
Saturday Night
Apr 18
|
Chance Rain Showers
|
35°F |
9 to 16 mph
WNW
|
|
Sunday
Apr 19
|
Sunny
|
54°F |
10 to 15 mph
WNW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
36°F |
5 to 9 mph
WSW
|
|
Monday
Apr 20
|
Sunny
|
66°F |
5 to 13 mph
S
|
|
Monday Night
Apr 20
|
Mostly Clear
|
48°F |
10 mph
SSW
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
73°F |
10 to 15 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Knox.
