Summit, IL Weather Forecast
Local 7-day forecast
Partly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Summit, IL in one place.
Partly cloudy, with a low around 63. Northeast wind around 7 mph.
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: Jun 2, 2026 6:36 AM CDT.
The active forecast window currently covers Jun 2 to Jun 8, 2026 for Summit, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jun 2 to Jun 8, 2026
- Latest sync
- Jun 2, 2026 6:36 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Summit
Saturday looks like the warmest upcoming period in Summit at 87 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Tuesday at about 7 to 12 mph E.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jun 2, 2026 6:36 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Sunny, with a high near 80. East wind 7 to 12 mph.
Clear, with a low around 56. East wind 3 to 10 mph.
Sunny, with a high near 81. East wind 3 to 7 mph.
Mostly clear, with a low around 60. Southeast wind 2 to 6 mph.
Sunny, with a high near 85.
Mostly clear, with a low around 64.
Mostly sunny, with a high near 86.
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 50%.
A chance of rain showers before 7am, then showers and thunderstorms likely. Partly sunny, with a high near 87. Chance of precipitation is 60%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jun 2
|
Partly Cloudy
|
63°F |
7 mph
NE
|
|
Tuesday
Jun 2
|
Sunny
|
80°F |
7 to 12 mph
E
|
|
Tuesday Night
Jun 2
|
Clear
|
56°F |
3 to 10 mph
E
|
|
Wednesday
Jun 3
|
Sunny
|
81°F |
3 to 7 mph
E
|
|
Wednesday Night
Jun 3
|
Mostly Clear
|
60°F |
2 to 6 mph
SE
|
|
Thursday
Jun 4
|
Sunny
|
85°F |
2 to 9 mph
S
|
|
Thursday Night
Jun 4
|
Mostly Clear
|
64°F |
5 to 10 mph
S
|
|
Friday
Jun 5
|
Mostly Sunny
|
86°F |
5 to 10 mph
S
|
|
Friday Night
Jun 5
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
68°F |
5 to 10 mph
S
|
|
Saturday
Jun 6
|
Chance Showers And Thunderstorms
|
87°F |
5 to 9 mph
S
|
|
Saturday Night
Jun 6
|
Chance Showers And Thunderstorms
|
69°F |
3 to 8 mph
S
|
|
Sunday
Jun 7
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
87°F |
3 to 8 mph
S
|
|
Sunday Night
Jun 7
|
Chance Showers And Thunderstorms
|
70°F |
7 mph
S
|
|
Monday
Jun 8
|
Showers And Thunderstorms Likely
|
87°F |
8 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Summit.
