As of 06:02 CDT

Weather in Round Lake Park, IL

62°

Round Lake Park, Sunday, 9 August, 06:02

Mostly clear. Feels like 62°. High 80°, low 62°.

Pressure30.00 inHg

Wind3.9 mph S

Humidity93%

Visibility6.2 mi

Dew point60°

See detailed hourly forecast

Mon, 1087° / 69°

0.44

87 °

Round Lake Park, Monday, 10 August

Rain. High 87°, low 69°.

Pressure29.88 inHg

Wind3.9 mph NE

Humidity71%

Visibility6.2 mi

Dew point72°

Tue, 1182° / 66°

0.46

82 °

Round Lake Park, Tuesday, 11 August

Heavy rain. High 82°, low 66°.

Pressure29.83 inHg

Wind11.6 mph E

Humidity99%

Visibility4.2 mi

Dew point66°

Wed, 1282° / 67°

0.02

82 °

Round Lake Park, Wednesday, 12 August

Light rain. High 82°, low 67°.

Pressure29.83 inHg

Wind7 mph NW

Humidity66%

Visibility6.2 mi

Dew point70°

Thu, 1373° / 62°

73 °

Round Lake Park, Thursday, 13 August

Overcast. High 73°, low 62°.

Pressure30.03 inHg

Wind8.3 mph NE

Humidity58%

Visibility—

Dew point56°

Fri, 1473° / 57°

73 °

Round Lake Park, Friday, 14 August

Mostly clear. High 73°, low 57°.

Pressure30.18 inHg

Wind9.7 mph E

Humidity52%

Visibility—

Dew point52°

Sat, 1577° / 57°

77 °

Round Lake Park, Saturday, 15 August

Overcast. High 77°, low 57°.

Pressure30.24 inHg

Wind6.5 mph E

Humidity46%

Visibility—

Dew point52°

Sun, 1672° / 64°

0.03

72 °

Round Lake Park, Sunday, 16 August

Light rain. High 72°, low 64°.

Pressure30.09 inHg

Wind4.4 mph NW

Humidity70%

Visibility—

Dew point59°

Mon, 1780° / 63°

0.04

80 °

Round Lake Park, Monday, 17 August

Light rain. High 80°, low 63°.

Pressure30.06 inHg

Wind9.4 mph NE

Humidity63%

Visibility—

Dew point64°

Tue, 1878° / 60°

78 °

Round Lake Park, Tuesday, 18 August

Overcast. High 78°, low 60°.

Pressure30.03 inHg

Wind6 mph S

Humidity74%

Visibility—

Dew point61°

Wed, 1985° / 67°

0.21

85 °

Round Lake Park, Wednesday, 19 August

Light rain. High 85°, low 67°.

Pressure29.88 inHg

Wind15.6 mph S

Humidity58%

Visibility—

Dew point66°

Thu, 2094° / 74°

94 °

Round Lake Park, Thursday, 20 August

Overcast. High 94°, low 74°.

Pressure29.77 inHg

Wind8.1 mph SE

Humidity63%

Visibility—

Dew point72°

Fri, 2183° / 68°

83 °

Round Lake Park, Friday, 21 August

Clear. High 83°, low 68°.

Pressure29.94 inHg

Wind12.3 mph NE

Humidity54%

Visibility—

Dew point63°

Sat, 2292° / 65°

0.01

92 °

Round Lake Park, Saturday, 22 August

Light rain. High 92°, low 65°.

Pressure29.85 inHg

Wind11.9 mph S

Humidity48%

Visibility—

Dew point65°

Sun, 2390° / 67°

90 °

Round Lake Park, Sunday, 23 August

Overcast. High 90°, low 67°.

Pressure29.83 inHg

Wind12.5 mph NE

Humidity49%

Visibility—

Dew point66°

Mon, 2477° / 67°

0.05

77 °

Round Lake Park, Monday, 24 August

Light rain. High 77°, low 67°.

Pressure30.06 inHg

Wind13.4 mph NE

Humidity79%

Visibility—

Dew point66°

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 Round Lake Park, 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 Round Lake Park, 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.