As of 09:59 CDT

Weather in Harco, IL

73°

Harco, Thursday, 15 October, 09:59

Overcast. Feels like 75°. High 85°, low 70°.

Pressure30.03 inHg

Wind5.7 mph SE

Humidity100%

Visibility6.2 mi

Dew point73°

See detailed hourly forecast

Fri, 1671° / 52°

0.03

71 °

Harco, Friday, 16 October

Light rain. High 71°, low 52°.

Pressure30.18 inHg

Wind17.8 mph NW

Humidity47%

Visibility6.2 mi

Dew point40°

Sat, 1759° / 46°

59 °

Harco, Saturday, 17 October

Clear. High 59°, low 46°.

Pressure30.56 inHg

Wind7.6 mph NE

Humidity50%

Visibility6.2 mi

Dew point38°

Sun, 1864° / 43°

64 °

Harco, Sunday, 18 October

Clear. High 64°, low 43°.

Pressure30.50 inHg

Wind5.7 mph SE

Humidity44%

Visibility6.2 mi

Dew point38°

Mon, 1968° / 47°

68 °

Harco, Monday, 19 October

Partly cloudy. High 68°, low 47°.

Pressure30.39 inHg

Wind7.1 mph S

Humidity41%

Visibility—

Dew point40°

Tue, 2073° / 49°

73 °

Harco, Tuesday, 20 October

Partly cloudy. High 73°, low 49°.

Pressure30.33 inHg

Wind5.7 mph E

Humidity49%

Visibility—

Dew point49°

Wed, 2176° / 53°

76 °

Harco, Wednesday, 21 October

Clear. High 76°, low 53°.

Pressure30.30 inHg

Wind6.9 mph E

Humidity31%

Visibility—

Dew point39°

Thu, 2277° / 54°

77 °

Harco, Thursday, 22 October

Clear. High 77°, low 54°.

Pressure30.24 inHg

Wind6.4 mph E

Humidity29%

Visibility—

Dew point39°

Fri, 2378° / 54°

78 °

Harco, Friday, 23 October

Overcast. High 78°, low 54°.

Pressure30.21 inHg

Wind8.4 mph SE

Humidity32%

Visibility—

Dew point42°

Sat, 2478° / 56°

78 °

Harco, Saturday, 24 October

Overcast. High 78°, low 56°.

Pressure30.21 inHg

Wind14.9 mph S

Humidity29%

Visibility—

Dew point40°

Sun, 2576° / 57°

76 °

Harco, Sunday, 25 October

Clear. High 76°, low 57°.

Pressure30.42 inHg

Wind7.1 mph NE

Humidity47%

Visibility—

Dew point51°

Mon, 2679° / 54°

79 °

Harco, Monday, 26 October

Partly cloudy. High 79°, low 54°.

Pressure30.39 inHg

Wind8.2 mph NE

Humidity39%

Visibility—

Dew point48°

Tue, 2779° / 59°

79 °

Harco, Tuesday, 27 October

Overcast. High 79°, low 59°.

Pressure30.24 inHg

Wind13.9 mph SW

Humidity36%

Visibility—

Dew point46°

Wed, 2877° / 60°

77 °

Harco, Wednesday, 28 October

Overcast. High 77°, low 60°.

Pressure30.12 inHg

Wind15.9 mph SW

Humidity30%

Visibility—

Dew point41°

Thu, 2979° / 65°

0.02

79 °

Harco, Thursday, 29 October

Light rain. High 79°, low 65°.

Pressure30.03 inHg

Wind12.7 mph SW

Humidity55%

Visibility—

Dew point56°

Fri, 3077° / 70°

0.51

77 °

Harco, Friday, 30 October

Rain. High 77°, low 70°.

Pressure29.88 inHg

Wind16.5 mph W

Humidity74%

Visibility—

Dew point64°

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 Harco, 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 Harco, 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.