10-day forecast for Flat Rock, IL: 62° to 94°, with precipitation expected on 5 days. The table below breaks each day into morning, afternoon, evening and overnight.
92°
Best day: Sunday, August 9
82° · 1.5 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0992° / 73°0
Morning77°feels 79°
Afternoon90°feels 101°
Evening85°feels 96°
Overnight74°feels 76°
92 °
Flat Rock, Sunday, 9 August
Overcast. High 92°, low 73°.
Pressure30.03 inHg
Wind11.1 mph SW
Humidity66%
Visibility6.2 mi
Dew point73°
Mon, 1091° / 75°0
Morning78°feels 79°
Afternoon88°feels 96°
Evening82°feels 88°
Overnight79°feels 79°
91 °
Flat Rock, Monday, 10 August
Clear. High 91°, low 75°.
Pressure29.97 inHg
Wind13.7 mph SW
Humidity62%
Visibility6.2 mi
Dew point73°
Tue, 1194° / 73°0.02
Morning77°feels 78°
Afternoon91°feels 102°
Evening83°feels 90°
Overnight79°feels 79°
94 °
Flat Rock, Tuesday, 11 August
Light rain. High 94°, low 73°.
Pressure29.88 inHg
Wind13.6 mph SW
Humidity61%
Visibility6.2 mi
Dew point74°
Wed, 1284° / 68°0.34
Morning77°feels 78°
Afternoon88°feels 95°
Evening69°feels 70°
Overnight83°feels 86°
84 °
Flat Rock, Wednesday, 12 August
Rain. High 84°, low 68°.
Pressure29.85 inHg
Wind9.8 mph W
Humidity75%
Visibility6.2 mi
Dew point76°
Thu, 1382° / 66°1.5
Morning73°feels 74°
Afternoon80°feels 84°
Evening71°feels 72°
Overnight67°feels 68°
82 °
Flat Rock, Thursday, 13 August
Heavy rain. High 82°, low 66°.
Pressure29.97 inHg
Wind13.1 mph E
Humidity69%
Visibility—
Dew point69°
Fri, 1474° / 66°0.3
Morning67°feels 68°
Afternoon69°feels 70°
Evening71°feels 72°
Overnight68°feels 69°
74 °
Flat Rock, Friday, 14 August
Rain. High 74°, low 66°.
Pressure30.06 inHg
Wind10 mph E
Humidity92%
Visibility—
Dew point66°
Sat, 1572° / 63°0.03
Morning65°feels 65°
Afternoon68°feels 69°
Evening69°feels 70°
Overnight66°feels 66°
72 °
Flat Rock, Saturday, 15 August
Light rain. High 72°, low 63°.
Pressure30.27 inHg
Wind8.9 mph SE
Humidity82%
Visibility—
Dew point61°
Sun, 1679° / 62°0.16
Morning68°feels 69°
Afternoon78°feels 78°
Evening73°feels 74°
Overnight70°feels 71°
79 °
Flat Rock, Sunday, 16 August
Light rain. High 79°, low 62°.
Pressure30.06 inHg
Wind7.5 mph NE
Humidity76%
Visibility—
Dew point69°
Mon, 1779° / 67°0.06
Morning70°feels 71°
Afternoon75°feels 76°
Evening75°feels 76°
Overnight69°feels 70°
79 °
Flat Rock, Monday, 17 August
Light rain. High 79°, low 67°.
Pressure30.03 inHg
Wind6.7 mph NE
Humidity89%
Visibility—
Dew point70°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Flat Rock, IL around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.