Flat Rock, IL Weather Forecast
Local 7-day forecast
Isolated Rain Showers then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Flat Rock, IL in one place.
Isolated rain showers before 7am. Mostly sunny, with a high near 77. West southwest wind around 12 mph, with gusts as high as 18 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Flat Rock, 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: Apr 21, 2026 9:55 PM CDT.
The active forecast window currently covers Apr 22 to Apr 28, 2026 for Flat Rock, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 22 to Apr 28, 2026
- Latest sync
- Apr 21, 2026 9:55 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Flat Rock
Thursday looks like the warmest upcoming period in Flat Rock at 80 degrees F.
Saturday Night is the coolest period ahead with temperatures near 52 degrees F.
The strongest winds are forecast for Monday at about 16 mph SSE.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 21, 2026 9:55 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KVWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 57. South wind around 8 mph.
Sunny, with a high near 80. South wind 6 to 14 mph, with gusts as high as 23 mph.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62. South wind around 12 mph, with gusts as high as 18 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 76. South southwest wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 57. West northwest wind 5 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms. Partly sunny, with a high near 76. Chance of precipitation is 30%.
A slight chance of rain showers before 7pm. Partly cloudy, with a low around 52.
Mostly sunny, with a high near 76.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 57.
Showers and thunderstorms likely. Partly sunny, with a high near 77.
Showers and thunderstorms likely. Mostly cloudy, with a low around 55.
A chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 70.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 22
|
Isolated Rain Showers then Mostly Sunny
|
77°F |
12 mph
WSW
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
57°F |
8 mph
S
|
|
Thursday
Apr 23
|
Sunny
|
80°F |
6 to 14 mph
S
|
|
Thursday Night
Apr 23
|
Partly Cloudy then Chance Showers And Thunderstorms
|
62°F |
12 mph
S
|
|
Friday
Apr 24
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
76°F |
10 to 15 mph
SSW
|
|
Friday Night
Apr 24
|
Showers And Thunderstorms then Chance Showers And Thunderstorms
|
57°F |
5 to 9 mph
WNW
|
|
Saturday
Apr 25
|
Chance Showers And Thunderstorms
|
76°F |
6 to 9 mph
N
|
|
Saturday Night
Apr 25
|
Slight Chance Rain Showers then Partly Cloudy
|
52°F |
7 mph
NE
|
|
Sunday
Apr 26
|
Mostly Sunny
|
76°F |
9 mph
ENE
|
|
Sunday Night
Apr 26
|
Partly Cloudy then Chance Showers And Thunderstorms
|
57°F |
8 to 14 mph
E
|
|
Monday
Apr 27
|
Showers And Thunderstorms Likely
|
77°F |
16 mph
SSE
|
|
Monday Night
Apr 27
|
Showers And Thunderstorms Likely
|
55°F |
14 mph
SW
|
|
Tuesday
Apr 28
|
Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
70°F |
14 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Flat Rock.