As of 15:23 CDT

Weather in Harco, IL

86°

Harco, Thursday, 15 October, 15:23

Partly cloudy. Feels like 93°. High 86°, low 70°.

Pressure29.94 inHg

Wind16.1 mph SW

Humidity66%

Visibility5.4 mi

Dew point74°

See detailed hourly forecast

Fri, 1671° / 52°

0.38

71 °

Harco, Friday, 16 October

Rain. High 71°, low 52°.

Pressure30.18 inHg

Wind17.9 mph NW

Humidity47%

Visibility6.2 mi

Dew point38°

Sat, 1758° / 46°

58 °

Harco, Saturday, 17 October

Clear. High 58°, low 46°.

Pressure30.53 inHg

Wind8.8 mph NE

Humidity52%

Visibility6.2 mi

Dew point38°

Sun, 1863° / 42°

63 °

Harco, Sunday, 18 October

Clear. High 63°, low 42°.

Pressure30.50 inHg

Wind7.6 mph SE

Humidity48%

Visibility6.2 mi

Dew point39°

Mon, 1968° / 43°

68 °

Harco, Monday, 19 October

Clear. High 68°, low 43°.

Pressure30.39 inHg

Wind2.8 mph S

Humidity48%

Visibility6.2 mi

Dew point44°

Tue, 2069° / 45°

69 °

Harco, Tuesday, 20 October

Partly cloudy. High 69°, low 45°.

Pressure30.33 inHg

Wind4.4 mph NE

Humidity44%

Visibility—

Dew point43°

Wed, 2174° / 48°

74 °

Harco, Wednesday, 21 October

Clear. High 74°, low 48°.

Pressure30.30 inHg

Wind5.5 mph E

Humidity34%

Visibility—

Dew point39°

Thu, 2277° / 53°

77 °

Harco, Thursday, 22 October

Clear. High 77°, low 53°.

Pressure30.27 inHg

Wind6.1 mph E

Humidity27%

Visibility—

Dew point37°

Fri, 2379° / 55°

79 °

Harco, Friday, 23 October

Overcast. High 79°, low 55°.

Pressure30.18 inHg

Wind7.7 mph S

Humidity32%

Visibility—

Dew point42°

Sat, 2480° / 60°

80 °

Harco, Saturday, 24 October

Overcast. High 80°, low 60°.

Pressure30.21 inHg

Wind8.6 mph S

Humidity32%

Visibility—

Dew point44°

Sun, 2580° / 58°

80 °

Harco, Sunday, 25 October

Mostly clear. High 80°, low 58°.

Pressure30.36 inHg

Wind8 mph E

Humidity32%

Visibility—

Dew point44°

Mon, 2679° / 56°

79 °

Harco, Monday, 26 October

Clear. High 79°, low 56°.

Pressure30.36 inHg

Wind9.4 mph E

Humidity34%

Visibility—

Dew point45°

Tue, 2776° / 55°

76 °

Harco, Tuesday, 27 October

Overcast. High 76°, low 55°.

Pressure30.27 inHg

Wind9.9 mph S

Humidity23%

Visibility—

Dew point33°

Wed, 2878° / 55°

78 °

Harco, Wednesday, 28 October

Overcast. High 78°, low 55°.

Pressure30.27 inHg

Wind9.9 mph S

Humidity29%

Visibility—

Dew point40°

Thu, 2978° / 53°

78 °

Harco, Thursday, 29 October

Overcast. High 78°, low 53°.

Pressure30.15 inHg

Wind12.4 mph S

Humidity36%

Visibility—

Dew point46°

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.