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As of 18:29 CDT

Weather in Harco, IL

73°Current weather

Harco, Wednesday, 14 October, 18:29

Overcast. Feels like 75°. High 79°, low 72°.

Pressure30.03 inHg
Wind0 mph N
Humidity94%
Visibility6.2 mi
Dew point71°
Thu, 1587° / 70°0.44Rain
87 °Rain

Harco, Thursday, 15 October

Rain. High 87°, low 70°.

Pressure30.00 inHg
Wind8.5 mph SW
Humidity77%
Visibility6.2 mi
Dew point73°
Fri, 1672° / 52°0.08Light rain
72 °Light rain

Harco, Friday, 16 October

Light rain. High 72°, low 52°.

Pressure30.15 inHg
Wind18.1 mph NW
Humidity45%
Visibility6.2 mi
Dew point37°
Sat, 1759° / 47°0Clear
59 °Clear

Harco, Saturday, 17 October

Clear. High 59°, low 47°.

Pressure30.50 inHg
Wind10.3 mph N
Humidity50%
Visibility6.2 mi
Dew point38°
Sun, 1863° / 42°0Clear
63 °Clear

Harco, Sunday, 18 October

Clear. High 63°, low 42°.

Pressure30.50 inHg
Wind6.1 mph E
Humidity45%
Visibility6.2 mi
Dew point37°
Mon, 1966° / 43°0Overcast
66 °Overcast

Harco, Monday, 19 October

Overcast. High 66°, low 43°.

Pressure30.39 inHg
Wind6.3 mph NE
Humidity40%
Visibility—
Dew point37°
Tue, 2075° / 47°0Clear
75 °Clear

Harco, Tuesday, 20 October

Clear. High 75°, low 47°.

Pressure30.27 inHg
Wind8 mph SE
Humidity42%
Visibility—
Dew point46°
Wed, 2178° / 63°0Overcast
78 °Overcast

Harco, Wednesday, 21 October

Overcast. High 78°, low 63°.

Pressure30.24 inHg
Wind8.1 mph SE
Humidity45%
Visibility—
Dew point51°
Thu, 2283° / 60°0.01Light rain
83 °Light rain

Harco, Thursday, 22 October

Light rain. High 83°, low 60°.

Pressure30.09 inHg
Wind15.5 mph SW
Humidity41%
Visibility—
Dew point52°
Fri, 2384° / 69°0Overcast
84 °Overcast

Harco, Friday, 23 October

Overcast. High 84°, low 69°.

Pressure30.06 inHg
Wind8.3 mph SW
Humidity40%
Visibility—
Dew point55°
Sat, 2486° / 65°0Overcast
86 °Overcast

Harco, Saturday, 24 October

Overcast. High 86°, low 65°.

Pressure30.06 inHg
Wind15.6 mph SW
Humidity31%
Visibility—
Dew point49°
Sun, 2562° / 51°0Light rain
62 °Light rain

Harco, Sunday, 25 October

Light rain. High 62°, low 51°.

Pressure30.33 inHg
Wind13.4 mph N
Humidity31%
Visibility—
Dew point30°
Mon, 2662° / 43°0Overcast
62 °Overcast

Harco, Monday, 26 October

Overcast. High 62°, low 43°.

Pressure30.39 inHg
Wind7 mph NE
Humidity29%
Visibility—
Dew point26°
Tue, 2763° / 42°0Overcast
63 °Overcast

Harco, Tuesday, 27 October

Overcast. High 63°, low 42°.

Pressure30.27 inHg
Wind7.7 mph E
Humidity24%
Visibility—
Dew point22°
Wed, 2859° / 51°0.11Light rain
59 °Light rain

Harco, Wednesday, 28 October

Light rain. High 59°, low 51°.

Pressure30.09 inHg
Wind11.2 mph S
Humidity39%
Visibility—
Dew point33°
Thu, 2962° / 50°0Light rain
62 °Light rain

Harco, Thursday, 29 October

Light rain. High 62°, low 50°.

Pressure30.12 inHg
Wind7.4 mph SW
Humidity64%
Visibility—
Dew point45°

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.