Flat Rock, IL Weather Forecast
Local 7-day forecast
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Flat Rock, IL in one place.
A chance of rain showers before 10am, then a slight chance of showers and thunderstorms between 10am and 11am, then showers and thunderstorms likely between 11am and 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 82. South southeast wind 5 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter 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: Oct 14, 2026 8:28 AM CDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for Flat Rock, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 14, 2026 8:28 AM 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 82 degrees F.
Saturday Night is the coolest period ahead with temperatures near 38 degrees F.
The strongest winds are forecast for Friday at about 21 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 8:28 AM CDT
- Coverage
- 6 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
Showers and thunderstorms likely. Mostly cloudy. Low around 53, with temperatures rising to around 59 overnight. West southwest wind 8 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Rain showers likely before 7am. Partly sunny, with a high near 60. Northwest wind around 21 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
Mostly clear, with a low around 41. North northwest wind 8 to 18 mph, with gusts as high as 25 mph.
Sunny, with a high near 60. North northeast wind 2 to 7 mph.
Clear, with a low around 38.
Sunny, with a high near 68.
Mostly clear, with a low around 45.
Mostly sunny, with a high near 69.
Mostly cloudy, with a low around 48.
Mostly sunny, with a high near 74.
Partly cloudy, with a low around 51.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
82°F |
5 to 10 mph
SSE
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms Likely
|
53°F |
8 to 18 mph
WSW
|
|
Friday
Oct 16
|
Rain Showers Likely then Partly Sunny
|
60°F |
21 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
41°F |
8 to 18 mph
NNW
|
|
Saturday
Oct 17
|
Sunny
|
60°F |
2 to 7 mph
NNE
|
|
Saturday Night
Oct 17
|
Clear
|
38°F |
3 mph
ESE
|
|
Sunday
Oct 18
|
Sunny
|
68°F |
3 to 9 mph
SSE
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
45°F |
7 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
69°F |
5 to 9 mph
S
|
|
Monday Night
Oct 19
|
Mostly Cloudy
|
48°F |
1 to 6 mph
SSE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
74°F |
2 to 6 mph
SE
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
51°F |
5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Flat Rock.