Cornell, IL Weather Forecast
Local 7-day forecast
Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Cornell, IL in one place.
Patchy fog and a chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Southeast wind around 0 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Cornell, 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: Sep 17, 2026 7:33 AM CDT.
The active forecast window currently covers Sep 17 to Sep 23, 2026 for Cornell, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 23, 2026
- Latest sync
- Sep 17, 2026 7:33 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Cornell
Saturday looks like the warmest upcoming period in Cornell at 89 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Monday Night at about 5 to 15 mph ENE.
Precipitation is mentioned in 12 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 17, 2026 7:33 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Patchy fog and a chance of showers and thunderstorms before 8am, then patchy fog and showers and thunderstorms likely between 8am and 9am, then patchy fog and a chance of showers and thunderstorms between 9am and 10am, then a chance of showers and thunderstorms. Mostly cloudy. High near 84, with temperatures falling to around 82 in the afternoon. Northwest wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
A slight chance of rain showers before 7pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Northeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of rain showers before 1pm. Mostly cloudy, with a high near 80. East northeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.
A chance of rain showers after 1am. Mostly cloudy, with a low around 66. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
A chance of rain showers before 4pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 67.
Showers and thunderstorms likely. Mostly cloudy, with a high near 76.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Mostly cloudy, with a high near 70.
A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 56.
A slight chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 72.
Partly cloudy, with a low around 55.
Mostly sunny, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Sep 17
|
Patchy Fog
|
69°F |
0 mph
|
|
Thursday
Sep 17
|
Patchy Fog then Chance Showers And Thunderstorms
|
84°F |
0 to 5 mph
NW
|
|
Thursday Night
Sep 17
|
Slight Chance Showers And Thunderstorms
|
66°F |
5 mph
NE
|
|
Friday
Sep 18
|
Slight Chance Rain Showers
|
80°F |
5 mph
ENE
|
|
Friday Night
Sep 18
|
Mostly Cloudy then Chance Rain Showers
|
66°F |
5 to 10 mph
ESE
|
|
Saturday
Sep 19
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
89°F |
5 to 10 mph
S
|
|
Saturday Night
Sep 19
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
67°F |
0 to 5 mph
SW
|
|
Sunday
Sep 20
|
Showers And Thunderstorms Likely
|
76°F |
0 to 10 mph
NNE
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
59°F |
10 mph
ENE
|
|
Monday
Sep 21
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
70°F |
10 mph
ENE
|
|
Monday Night
Sep 21
|
Chance Showers And Thunderstorms
|
56°F |
5 to 15 mph
ENE
|
|
Tuesday
Sep 22
|
Slight Chance Showers And Thunderstorms
|
72°F |
10 mph
NE
|
|
Tuesday Night
Sep 22
|
Partly Cloudy
|
55°F |
0 to 10 mph
NNE
|
|
Wednesday
Sep 23
|
Mostly Sunny
|
75°F |
0 to 5 mph
NNE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Cornell.