Flat Rock, IL 14 Day Weather - 62427 WeatherWorld.com
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Flat Rock, IL Weather Forecast


Flat Rock, IL Weather Forecast Dated: 1209 AM Thu Sep 03 2026 (Flat Rock Time)
Expect a hot stretch with plenty of sunshine and occasional showers over the coming period. comfortable humidity and no major pressure swings will dominate.
Thursday, September 3, 2026
Mid-Morning
84°F 29°C
Sunny
Mid-Afternoon
101°F 38°C
Cloudy
Early-Evening
90°F 33°C
Sunny
Scorching hot near 101°F 38°C, sunny in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure.
Friday, September 4, 2026
Mid-Morning
88°F 31°C
Partly Cloudy
Mid-Afternoon
102°F 39°C
Sunny
Early-Evening
93°F 34°C
Partly Cloudy
Sweltering temperatures near 102°F 39°C with a heat index of 105°F 40°C, cloudy in the morning, sunny in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds turning from the WSW to the ESE at 9 mph 14 km/h.
Saturday, September 5, 2026
Mid-Morning
90°F 32°C
Sunny
Mid-Afternoon
102°F 39°C
Sunny
Early-Evening
91°F 33°C
Sunny
Dangerously hot with a high of 102°F 39°C (heat index near 106°F 41°C), sunny through the afternoon, turning partly cloudy this evening, with increasing humidity and steady pressure. Winds switching from the WNW to the SSE at 7 mph 11 km/h.
Sunday, September 6, 2026
Mid-Morning
80°F 26°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
79°F 26°C
Partly Cloudy
Hot temperatures near 90°F 32°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds NE at 15 mph 23 km/h. Gusts up to 22 mph 35 km/h.
Monday, September 7, 2026
Mid-Morning
73°F 23°C
Sunny
Mid-Afternoon
92°F 33°C
Overcast
Early-Evening
81°F 27°C
Sunny
Very hot with a high of 92°F 33°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds out of the ENE at 8 mph 12 km/h.
Tuesday, September 8, 2026
Mid-Morning
82°F 28°C
Partly Cloudy
Mid-Afternoon
101°F 38°C
Overcast
Early-Evening
94°F 34°C
Partly Cloudy
Sweltering heat reaching 101°F 38°C, partly cloudy in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds shifting from the SSW to the S at 14 mph 21 km/h. Gusts up to 24 mph 39 km/h.
Wednesday, September 9, 2026
Mid-Morning
89°F 31°C
Partly Cloudy
Mid-Afternoon
105°F 40°C
Sunny
Early-Evening
90°F 33°C
Sunny
Dangerously hot temperatures around 105°F 40°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds WSW at 15 mph 24 km/h.
Thursday, September 10, 2026
Mid-Morning
87°F 31°C
Sunny
Mid-Afternoon
99°F 37°C
Partly Cloudy
Early-Evening
88°F 31°C
Sunny
Hot and sweltering around 99°F 37°C (heat index 103°F 39°C), sunny through the afternoon, turning partly cloudy this evening, with increasing humidity and steady pressure. Winds switching from the WNW to the NE at 9 mph 14 km/h.
Friday, September 11, 2026
Mid-Morning
86°F 30°C
Sunny
Mid-Afternoon
103°F 40°C
Sunny
Early-Evening
97°F 37°C
Cloudy
Scorching hot near 103°F 40°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds moving from the SSW to the S at 12 mph 19 km/h. Gusts up to 23 mph 37 km/h.
Saturday, September 12, 2026
Mid-Morning
89°F 32°C
Sunny
Mid-Afternoon
103°F 40°C
Sunny
Early-Evening
97°F 37°C
Sunny
Sweltering heat reaching 103°F 40°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds swinging from the SW to the SSW at 13 mph 21 km/h. Gusts up to 24 mph 38 km/h.
Sunday, September 13, 2026
Mid-Morning
91°F 33°C
Sunny
Mid-Afternoon
105°F 41°C
Sunny
Early-Evening
96°F 36°C
Partly Cloudy
Dangerously hot temperatures around 105°F 41°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds out of the WSW at 15 mph 24 km/h.
Monday, September 14, 2026
Mid-Morning
76°F 24°C
Light Showers
Mid-Afternoon
95°F 35°C
Sunny
Early-Evening
85°F 29°C
Sunny
Very hot with a high of 95°F 35°C, feeling closer to 98°F 36°C in the humidity, morning showers, giving way to clearing skies, with lower humidity and steady pressure. Winds blowing from the WNW at 8 mph 13 km/h.
Tuesday, September 15, 2026
Mid-Morning
79°F 26°C
Sunny
Mid-Afternoon
97°F 36°C
Sunny
Early-Evening
85°F 29°C
Sunny
Sizzling hot with 97°F 36°C, sunny throughout the day, with lower humidity and steady pressure. Winds switching from the SE to the ENE at 9 mph 14 km/h.
Wednesday, September 16, 2026
Mid-Morning
79°F 26°C
Sunny
Mid-Afternoon
97°F 36°C
Sunny
Early-Evening
87°F 31°C
Sunny
Hot temperatures near 97°F 36°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the ESE to the ENE at 9 mph 14 km/h.
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