Forest Park, IL Weather Forecast
Local 7-day forecast
Scattered Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Forest Park, IL in one place.
Scattered showers and thunderstorms before 3pm, then isolated showers and thunderstorms. Partly sunny, with a high near 82. West southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Forest 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: Sep 15, 2026 12:41 PM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Forest Park, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 12:41 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Forest Park
Saturday looks like the warmest upcoming period in Forest Park at 84 degrees F.
Monday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Today at about 5 to 10 mph WSW.
Precipitation is mentioned in 14 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 12:41 PM 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
Scattered showers and thunderstorms before 9pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65. North wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms likely before 4pm, then a slight chance of showers and thunderstorms. Mostly cloudy. High near 76, with temperatures falling to around 74 in the afternoon. Northeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
A slight chance of showers and thunderstorms before 1am, then showers and thunderstorms likely. Mostly cloudy, with a low around 67. Southeast wind 0 to 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Northwest wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 80.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
A chance of rain showers before 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65.
Rain showers likely before 7am, then a chance of showers and thunderstorms. Partly sunny, with a high near 76.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 72.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 55.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Sep 15
|
Scattered Showers And Thunderstorms
|
82°F |
5 to 10 mph
WSW
|
|
Tonight
Sep 15
|
Scattered Showers And Thunderstorms then Showers And Thunderstorms Likely
|
65°F |
5 mph
N
|
|
Wednesday
Sep 16
|
Showers And Thunderstorms Likely
|
76°F |
5 mph
NE
|
|
Wednesday Night
Sep 16
|
Slight Chance Showers And Thunderstorms
|
67°F |
0 to 5 mph
SE
|
|
Thursday
Sep 17
|
Showers And Thunderstorms Likely
|
81°F |
5 mph
NW
|
|
Thursday Night
Sep 17
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
65°F |
5 mph
NE
|
|
Friday
Sep 18
|
Chance Showers And Thunderstorms
|
80°F |
5 to 10 mph
ENE
|
|
Friday Night
Sep 18
|
Chance Showers And Thunderstorms
|
66°F |
10 mph
ESE
|
|
Saturday
Sep 19
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
84°F |
10 mph
SSW
|
|
Saturday Night
Sep 19
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
65°F |
5 to 10 mph
W
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
76°F |
5 to 10 mph
N
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
58°F |
5 to 10 mph
NE
|
|
Monday
Sep 21
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
72°F |
5 to 10 mph
NE
|
|
Monday Night
Sep 21
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
55°F |
5 to 10 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Forest Park.