As of 00:05 CDT

Weather in Chapman, IL

71°

Chapman, Thursday, 15 October, 00:05

Overcast. Feels like 72°. High 74°, low 66°.

Pressure30.03 inHg

Wind3.9 mph NE

Humidity91%

Visibility6.2 mi

Dew point68°

See detailed hourly forecast

Fri, 1665° / 51°

0.05

65 °

Chapman, Friday, 16 October

Light rain. High 65°, low 51°.

Pressure30.18 inHg

Wind18.9 mph NW

Humidity52%

Visibility6.2 mi

Dew point37°

Sat, 1757° / 42°

57 °

Chapman, Saturday, 17 October

Clear. High 57°, low 42°.

Pressure30.56 inHg

Wind3.8 mph N

Humidity49%

Visibility6.2 mi

Dew point34°

Sun, 1861° / 41°

61 °

Chapman, Sunday, 18 October

Clear. High 61°, low 41°.

Pressure30.50 inHg

Wind6.8 mph S

Humidity43%

Visibility6.2 mi

Dew point35°

Mon, 1966° / 43°

66 °

Chapman, Monday, 19 October

Overcast. High 66°, low 43°.

Pressure30.39 inHg

Wind4.6 mph S

Humidity43%

Visibility—

Dew point39°

Tue, 2072° / 47°

72 °

Chapman, Tuesday, 20 October

Overcast. High 72°, low 47°.

Pressure30.33 inHg

Wind8.3 mph S

Humidity41%

Visibility—

Dew point42°

Wed, 2176° / 54°

76 °

Chapman, Wednesday, 21 October

Mostly clear. High 76°, low 54°.

Pressure30.30 inHg

Wind8.9 mph SE

Humidity36%

Visibility—

Dew point44°

Thu, 2280° / 56°

80 °

Chapman, Thursday, 22 October

Clear. High 80°, low 56°.

Pressure30.21 inHg

Wind11.6 mph S

Humidity35%

Visibility—

Dew point45°

Fri, 2379° / 63°

0.03

79 °

Chapman, Friday, 23 October

Light rain. High 79°, low 63°.

Pressure30.06 inHg

Wind21.4 mph S

Humidity47%

Visibility—

Dew point55°

Sat, 2472° / 64°

0.49

72 °

Chapman, Saturday, 24 October

Rain. High 72°, low 64°.

Pressure30.18 inHg

Wind12.7 mph S

Humidity81%

Visibility—

Dew point61°

Sun, 2565° / 58°

2.05

65 °

Chapman, Sunday, 25 October

Heavy rain. High 65°, low 58°.

Pressure30.09 inHg

Wind11.4 mph S

Humidity97%

Visibility—

Dew point63°

Mon, 2658° / 47°

0.58

58 °

Chapman, Monday, 26 October

Rain. High 58°, low 47°.

Pressure30.12 inHg

Wind19.9 mph NW

Humidity44%

Visibility—

Dew point33°

Tue, 2762° / 45°

62 °

Chapman, Tuesday, 27 October

Overcast. High 62°, low 45°.

Pressure30.15 inHg

Wind5.9 mph NE

Humidity43%

Visibility—

Dew point36°

Wed, 2863° / 47°

63 °

Chapman, Wednesday, 28 October

Partly cloudy. High 63°, low 47°.

Pressure29.91 inHg

Wind6.9 mph NE

Humidity45%

Visibility—

Dew point38°

Thu, 2965° / 48°

65 °

Chapman, Thursday, 29 October

Clear. High 65°, low 48°.

Pressure30.03 inHg

Wind12.3 mph NW

Humidity49%

Visibility—

Dew point42°

Fri, 3062° / 46°

62 °

Chapman, Friday, 30 October

Partly cloudy. High 62°, low 46°.

Pressure30.12 inHg

Wind12.3 mph S

Humidity37%

Visibility—

Dew point34°

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 Chapman, 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 Chapman, 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.