As of 11:40 CDT

Weather in Grant Park, IL

65°

Grant Park, Wednesday, 21 October, 11:40

Clear. Feels like 64°. High 69°, low 41°.

Pressure30.27 inHg

Wind2.7 mph SW

Humidity57%

Visibility6.2 mi

Dew point50°

See detailed hourly forecast

Thu, 2272° / 45°

72 °

Grant Park, Thursday, 22 October

Clear. High 72°, low 45°.

Pressure30.27 inHg

Wind1.6 mph N

Humidity57%

Visibility6.2 mi

Dew point53°

Fri, 2369° / 47°

69 °

Grant Park, Friday, 23 October

Clear. High 69°, low 47°.

Pressure30.36 inHg

Wind4.4 mph S

Humidity55%

Visibility6.2 mi

Dew point50°

Sat, 2467° / 47°

67 °

Grant Park, Saturday, 24 October

Mostly clear. High 67°, low 47°.

Pressure30.42 inHg

Wind6.9 mph S

Humidity59%

Visibility6.2 mi

Dew point50°

Sun, 2569° / 48°

69 °

Grant Park, Sunday, 25 October

Overcast. High 69°, low 48°.

Pressure30.39 inHg

Wind5.7 mph S

Humidity47%

Visibility—

Dew point45°

Mon, 2671° / 51°

71 °

Grant Park, Monday, 26 October

Overcast. High 71°, low 51°.

Pressure30.24 inHg

Wind8.9 mph SW

Humidity45%

Visibility—

Dew point46°

Tue, 2764° / 51°

64 °

Grant Park, Tuesday, 27 October

Overcast. High 64°, low 51°.

Pressure30.30 inHg

Wind10.6 mph E

Humidity54%

Visibility—

Dew point43°

Wed, 2871° / 56°

0.01

71 °

Grant Park, Wednesday, 28 October

Light rain. High 71°, low 56°.

Pressure30.09 inHg

Wind14.3 mph SW

Humidity46%

Visibility—

Dew point46°

Thu, 2965° / 47°

0.07

65 °

Grant Park, Thursday, 29 October

Light rain. High 65°, low 47°.

Pressure30.18 inHg

Wind15.3 mph N

Humidity62%

Visibility—

Dew point44°

Fri, 3059° / 42°

59 °

Grant Park, Friday, 30 October

Overcast. High 59°, low 42°.

Pressure30.27 inHg

Wind10.7 mph E

Humidity32%

Visibility—

Dew point26°

Sat, 3169° / 47°

0.02

69 °

Grant Park, Saturday, 31 October

Light rain. High 69°, low 47°.

Pressure29.97 inHg

Wind18.1 mph S

Humidity62%

Visibility—

Dew point47°

Sun, 0166° / 58°

1.13

66 °

Grant Park, Sunday, 1 November

Rain. High 66°, low 58°.

Pressure29.91 inHg

Wind21.1 mph S

Humidity90%

Visibility—

Dew point56°

Mon, 0261° / 60°

1.43

61 °

Grant Park, Monday, 2 November

Rain. High 61°, low 60°.

Pressure29.83 inHg

Wind12 mph S

Humidity97%

Visibility—

Dew point60°

Tue, 0364° / 59°

0.68

64 °

Grant Park, Tuesday, 3 November

Rain. High 64°, low 59°.

Pressure29.68 inHg

Wind14.8 mph E

Humidity91%

Visibility—

Dew point57°

Wed, 0461° / 53°

0.48

61 °

Grant Park, Wednesday, 4 November

Light rain. High 61°, low 53°.

Pressure29.41 inHg

Wind17.7 mph S

Humidity73%

Visibility—

Dew point52°

Thu, 0551° / 49°

0.09

51 °

Grant Park, Thursday, 5 November

Light rain. High 51°, low 49°.

Pressure29.56 inHg

Wind15.9 mph S

Humidity89%

Visibility—

Dew point46°

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 Grant 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 Grant 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.