As of 13:17 CDT

Weather in Grant Park, IL

69°

Grant Park, Tuesday, 20 October, 13:17

Clear. Feels like 68°. High 69°, low 41°.

Pressure30.33 inHg

Wind1 mph E

Humidity43%

Visibility6.2 mi

Dew point45°

See detailed hourly forecast

Wed, 2171° / 40°

71 °

Grant Park, Wednesday, 21 October

Clear. High 71°, low 40°.

Pressure30.27 inHg

Wind2.3 mph W

Humidity46%

Visibility6.2 mi

Dew point45°

Thu, 2270° / 46°

70 °

Grant Park, Thursday, 22 October

Mostly clear. High 70°, low 46°.

Pressure30.30 inHg

Wind2.4 mph E

Humidity62%

Visibility6.2 mi

Dew point54°

Fri, 2366° / 47°

66 °

Grant Park, Friday, 23 October

Clear. High 66°, low 47°.

Pressure30.36 inHg

Wind5.8 mph SE

Humidity64%

Visibility6.2 mi

Dew point51°

Sat, 2467° / 46°

67 °

Grant Park, Saturday, 24 October

Partly cloudy. High 67°, low 46°.

Pressure30.39 inHg

Wind7.7 mph S

Humidity60%

Visibility6.2 mi

Dew point48°

Sun, 2573° / 52°

73 °

Grant Park, Sunday, 25 October

Overcast. High 73°, low 52°.

Pressure30.36 inHg

Wind7 mph S

Humidity51%

Visibility—

Dew point49°

Mon, 2671° / 49°

0.04

71 °

Grant Park, Monday, 26 October

Light rain. High 71°, low 49°.

Pressure30.06 inHg

Wind17 mph SW

Humidity37%

Visibility—

Dew point41°

Tue, 2747° / 38°

0.28

47 °

Grant Park, Tuesday, 27 October

Rain. High 47°, low 38°.

Pressure30.36 inHg

Wind17.7 mph NW

Humidity39%

Visibility—

Dew point22°

Wed, 2847° / 31°

47 °

Grant Park, Wednesday, 28 October

Clear. High 47°, low 31°.

Pressure30.42 inHg

Wind10.6 mph SW

Humidity35%

Visibility—

Dew point18°

Thu, 2952° / 37°

52 °

Grant Park, Thursday, 29 October

Clear. High 52°, low 37°.

Pressure30.06 inHg

Wind15 mph W

Humidity49%

Visibility—

Dew point32°

Fri, 3045° / 33°

45 °

Grant Park, Friday, 30 October

Clear. High 45°, low 33°.

Pressure30.36 inHg

Wind14.3 mph NW

Humidity39%

Visibility—

Dew point19°

Sat, 3149° / 30°

49 °

Grant Park, Saturday, 31 October

Partly cloudy. High 49°, low 30°.

Pressure30.27 inHg

Wind12 mph SW

Humidity33%

Visibility—

Dew point18°

Sun, 0150° / 40°

50 °

Grant Park, Sunday, 1 November

Overcast. High 50°, low 40°.

Pressure30.12 inHg

Wind11.2 mph W

Humidity76%

Visibility—

Dew point40°

Mon, 0260° / 42°

60 °

Grant Park, Monday, 2 November

Clear. High 60°, low 42°.

Pressure30.30 inHg

Wind8.7 mph SW

Humidity50%

Visibility—

Dew point38°

Tue, 0361° / 44°

61 °

Grant Park, Tuesday, 3 November

Overcast. High 61°, low 44°.

Pressure30.21 inHg

Wind14.2 mph S

Humidity44%

Visibility—

Dew point36°

Wed, 0457° / 51°

0.61

57 °

Grant Park, Wednesday, 4 November

Rain. High 57°, low 51°.

Pressure29.94 inHg

Wind16.5 mph S

Humidity91%

Visibility—

Dew point50°

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.