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As of 18:40 CDT

Weather in Flat Rock, IL

86°Current weather

Flat Rock, Saturday, 8 August, 18:40

Clear. Feels like 96°. High 89°, low 72°.

Pressure30.00 inHg
Wind5.3 mph SW
Humidity73%
Visibility6.2 mi
Dew point76°
Sun, 0992° / 73°0Clear
92 °Clear

Flat Rock, Sunday, 9 August

Clear. High 92°, low 73°.

Pressure30.00 inHg
Wind12.4 mph SW
Humidity67%
Visibility6.2 mi
Dew point73°
Mon, 1092° / 75°0Mostly clear
92 °Mostly clear

Flat Rock, Monday, 10 August

Mostly clear. High 92°, low 75°.

Pressure30.00 inHg
Wind14.7 mph SW
Humidity63%
Visibility6.2 mi
Dew point74°
Tue, 1193° / 76°0Overcast
93 °Overcast

Flat Rock, Tuesday, 11 August

Overcast. High 93°, low 76°.

Pressure29.91 inHg
Wind15 mph SW
Humidity59%
Visibility6.2 mi
Dew point73°
Wed, 1288° / 70°1.49Heavy rain
88 °Heavy rain

Flat Rock, Wednesday, 12 August

Heavy rain. High 88°, low 70°.

Pressure29.83 inHg
Wind6.4 mph W
Humidity66%
Visibility6.2 mi
Dew point74°
Thu, 1380° / 69°1.2Heavy rain
80 °Heavy rain

Flat Rock, Thursday, 13 August

Heavy rain. High 80°, low 69°.

Pressure29.88 inHg
Wind11.7 mph W
Humidity78%
Visibility—
Dew point71°
Fri, 1474° / 61°0.03Light rain
74 °Light rain

Flat Rock, Friday, 14 August

Light rain. High 74°, low 61°.

Pressure30.12 inHg
Wind12.2 mph NE
Humidity58%
Visibility—
Dew point57°
Sat, 1575° / 55°0Mostly clear
75 °Mostly clear

Flat Rock, Saturday, 15 August

Mostly clear. High 75°, low 55°.

Pressure30.30 inHg
Wind7.4 mph NE
Humidity59%
Visibility—
Dew point55°
Sun, 1678° / 57°0Overcast
78 °Overcast

Flat Rock, Sunday, 16 August

Overcast. High 78°, low 57°.

Pressure30.21 inHg
Wind8 mph S
Humidity58%
Visibility—
Dew point58°
Mon, 1783° / 66°0.08Light rain
83 °Light rain

Flat Rock, Monday, 17 August

Light rain. High 83°, low 66°.

Pressure30.00 inHg
Wind15 mph SW
Humidity74%
Visibility—
Dew point72°
Tue, 1883° / 70°0.03Light rain
83 °Light rain

Flat Rock, Tuesday, 18 August

Light rain. High 83°, low 70°.

Pressure29.97 inHg
Wind9.6 mph NE
Humidity81%
Visibility—
Dew point73°
Wed, 1987° / 69°0Partly cloudy
87 °Partly cloudy

Flat Rock, Wednesday, 19 August

Partly cloudy. High 87°, low 69°.

Pressure29.94 inHg
Wind6.5 mph SE
Humidity67%
Visibility—
Dew point70°
Thu, 2082° / 72°0.25Rain
82 °Rain

Flat Rock, Thursday, 20 August

Rain. High 82°, low 72°.

Pressure29.88 inHg
Wind6.2 mph S
Humidity77%
Visibility—
Dew point70°
Fri, 2179° / 68°0.01Light rain
79 °Light rain

Flat Rock, Friday, 21 August

Light rain. High 79°, low 68°.

Pressure29.91 inHg
Wind7.9 mph N
Humidity74%
Visibility—
Dew point67°
Sat, 2282° / 63°0Overcast
82 °Overcast

Flat Rock, Saturday, 22 August

Overcast. High 82°, low 63°.

Pressure29.94 inHg
Wind15.7 mph NE
Humidity62%
Visibility—
Dew point64°
Sun, 2374° / 57°0Overcast
74 °Overcast

Flat Rock, Sunday, 23 August

Overcast. High 74°, low 57°.

Pressure30.12 inHg
Wind13.9 mph NE
Humidity53%
Visibility—
Dew point52°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Flat Rock, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Flat Rock, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.