Grant Park, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Grant Park, IL in one place.
A chance of rain showers before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 66. East southeast wind 5 to 10 mph. Chance of precipitation is 100%.
Local Weather Overview
This forecast page for Grant Park, 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 13, 2026 11:28 PM CDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for Grant Park, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 13, 2026 11:28 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Grant Park
Tuesday looks like the warmest upcoming period in Grant Park at 72 degrees F.
Friday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Friday at about 15 to 20 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 11:28 PM CDT
- 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
Showers and thunderstorms before 1am. Cloudy, with a low around 47. West wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%.
Partly sunny, with a high near 58.
Mostly clear, with a low around 34.
Patchy frost before 8am. Sunny, with a high near 60.
Clear, with a low around 37.
Sunny, with a high near 67.
Partly cloudy, with a low around 45.
Partly sunny, with a high near 68.
Mostly cloudy, with a low around 46.
Mostly sunny, with a high near 72.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
66°F |
5 to 10 mph
ESE
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms
|
47°F |
5 to 15 mph
W
|
|
Friday
Oct 16
|
Partly Sunny
|
58°F |
15 to 20 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
34°F |
0 to 15 mph
NNW
|
|
Saturday
Oct 17
|
Patchy Frost then Sunny
|
60°F |
0 to 5 mph
W
|
|
Saturday Night
Oct 17
|
Clear
|
37°F |
5 mph
SSW
|
|
Sunday
Oct 18
|
Sunny
|
67°F |
5 to 10 mph
SSW
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
45°F |
5 to 10 mph
SSW
|
|
Monday
Oct 19
|
Partly Sunny
|
68°F |
5 mph
SSW
|
|
Monday Night
Oct 19
|
Mostly Cloudy
|
46°F |
0 to 5 mph
S
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
72°F |
0 to 5 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grant Park.
