As of 00:03 CDT

Weather in Harco, IL

68°

Harco, Thursday, 15 October, 00:03

Overcast. Feels like 69°. High 86°, low 68°.

Pressure30.06 inHg

Wind0 mph N

Humidity100%

Visibility6.2 mi

Dew point68°

See detailed hourly forecast

Fri, 1670° / 52°

0.13

70 °

Harco, Friday, 16 October

Light rain. High 70°, low 52°.

Pressure30.18 inHg

Wind16.9 mph NW

Humidity47%

Visibility6.2 mi

Dew point36°

Sat, 1758° / 45°

58 °

Harco, Saturday, 17 October

Clear. High 58°, low 45°.

Pressure30.53 inHg

Wind8.6 mph NE

Humidity52%

Visibility6.2 mi

Dew point38°

Sun, 1863° / 42°

63 °

Harco, Sunday, 18 October

Clear. High 63°, low 42°.

Pressure30.50 inHg

Wind5.5 mph SE

Humidity48%

Visibility6.2 mi

Dew point38°

Mon, 1969° / 45°

69 °

Harco, Monday, 19 October

Mostly clear. High 69°, low 45°.

Pressure30.39 inHg

Wind4 mph SE

Humidity41%

Visibility—

Dew point40°

Tue, 2072° / 47°

72 °

Harco, Tuesday, 20 October

Partly cloudy. High 72°, low 47°.

Pressure30.33 inHg

Wind7 mph E

Humidity44%

Visibility—

Dew point44°

Wed, 2178° / 54°

78 °

Harco, Wednesday, 21 October

Clear. High 78°, low 54°.

Pressure30.30 inHg

Wind7.3 mph E

Humidity34%

Visibility—

Dew point43°

Thu, 2280° / 56°

80 °

Harco, Thursday, 22 October

Partly cloudy. High 80°, low 56°.

Pressure30.21 inHg

Wind8.2 mph S

Humidity36%

Visibility—

Dew point47°

Fri, 2379° / 63°

79 °

Harco, Friday, 23 October

Overcast. High 79°, low 63°.

Pressure30.15 inHg

Wind17.1 mph S

Humidity50%

Visibility—

Dew point53°

Sat, 2472° / 65°

0.26

72 °

Harco, Saturday, 24 October

Light rain. High 72°, low 65°.

Pressure30.21 inHg

Wind12.7 mph S

Humidity77%

Visibility—

Dew point62°

Sun, 2566° / 63°

0.68

66 °

Harco, Sunday, 25 October

Rain. High 66°, low 63°.

Pressure30.12 inHg

Wind6.8 mph S

Humidity87%

Visibility—

Dew point61°

Mon, 2663° / 49°

0.39

63 °

Harco, Monday, 26 October

Rain. High 63°, low 49°.

Pressure30.12 inHg

Wind15.2 mph NW

Humidity61%

Visibility—

Dew point44°

Tue, 2764° / 44°

64 °

Harco, Tuesday, 27 October

Mostly clear. High 64°, low 44°.

Pressure30.12 inHg

Wind10.8 mph NE

Humidity34%

Visibility—

Dew point32°

Wed, 2865° / 49°

65 °

Harco, Wednesday, 28 October

Overcast. High 65°, low 49°.

Pressure29.88 inHg

Wind9.9 mph N

Humidity42%

Visibility—

Dew point38°

Thu, 2969° / 47°

69 °

Harco, Thursday, 29 October

Clear. High 69°, low 47°.

Pressure30.03 inHg

Wind11.2 mph NW

Humidity40%

Visibility—

Dew point40°

Fri, 3066° / 45°

66 °

Harco, Friday, 30 October

Clear. High 66°, low 45°.

Pressure30.12 inHg

Wind7.9 mph E

Humidity30%

Visibility—

Dew point31°

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.