Summit, IL Weather Forecast
Local 7-day forecast
Mostly Cloudy then Chance Rain
Track current conditions, temperature changes, wind, and the full daily outlook for Summit, IL in one place.
A chance of rain after noon. Mostly cloudy, with a high near 55. East wind 0 to 10 mph. Chance of precipitation is 40%.
Local Weather Overview
This forecast page for Summit, 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: Nov 9, 2026 6:44 PM CST.
The active forecast window currently covers Nov 11 to Nov 15, 2026 for Summit, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 11 to Nov 15, 2026
- Latest sync
- Nov 9, 2026 6:44 PM CST
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Summit
Veterans Day looks like the warmest upcoming period in Summit at 55 degrees F.
Friday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Thursday at about 15 to 20 mph N.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Nov 9, 2026 6:44 PM CST
- Coverage
- 6 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
A chance of rain. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
A chance of rain. Mostly cloudy, with a high near 44.
A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 33.
A chance of snow before noon, then a chance of rain. Partly sunny, with a high near 43.
Partly cloudy, with a low around 31.
Sunny, with a high near 45.
Mostly clear, with a low around 33.
A slight chance of rain after noon. Sunny, with a high near 48.
Partly cloudy, with a low around 38.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Veterans Day
Nov 11
|
Mostly Cloudy then Chance Rain
|
55°F |
0 to 10 mph
E
|
|
Wednesday Night
Nov 11
|
Chance Rain
|
40°F |
10 to 15 mph
NNW
|
|
Thursday
Nov 12
|
Chance Rain
|
44°F |
15 to 20 mph
N
|
|
Thursday Night
Nov 12
|
Chance Rain then Chance Rain And Snow
|
33°F |
10 to 15 mph
NNW
|
|
Friday
Nov 13
|
Chance Snow then Chance Rain
|
43°F |
10 mph
NNW
|
|
Friday Night
Nov 13
|
Partly Cloudy
|
31°F |
5 to 10 mph
NNW
|
|
Saturday
Nov 14
|
Sunny
|
45°F |
5 mph
NW
|
|
Saturday Night
Nov 14
|
Mostly Clear
|
33°F |
0 mph
|
|
Sunday
Nov 15
|
Sunny then Slight Chance Rain
|
48°F |
0 to 5 mph
SW
|
|
Sunday Night
Nov 15
|
Partly Cloudy
|
38°F |
0 to 5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Summit.