As of 05:40 CDT

Weather in Chapman, IL

54°

Chapman, Friday, 9 October, 05:40

Partly cloudy. Feels like 52°. High 88°, low 54°.

Pressure30.09 inHg

Wind6.4 mph S

Humidity75%

Visibility6.2 mi

Dew point46°

See detailed hourly forecast

Sat, 1080° / 57°

80 °

Chapman, Saturday, 10 October

Overcast. High 80°, low 57°.

Pressure30.06 inHg

Wind6.1 mph SE

Humidity45%

Visibility6.2 mi

Dew point51°

Sun, 1179° / 58°

79 °

Chapman, Sunday, 11 October

Clear. High 79°, low 58°.

Pressure29.91 inHg

Wind7.9 mph NW

Humidity57%

Visibility6.2 mi

Dew point57°

Mon, 1290° / 64°

90 °

Chapman, Monday, 12 October

Clear. High 90°, low 64°.

Pressure29.91 inHg

Wind9.6 mph SW

Humidity42%

Visibility6.2 mi

Dew point59°

Tue, 1391° / 70°

91 °

Chapman, Tuesday, 13 October

Clear. High 91°, low 70°.

Pressure29.83 inHg

Wind11 mph SW

Humidity44%

Visibility—

Dew point62°

Wed, 1481° / 68°

1.24

81 °

Chapman, Wednesday, 14 October

Rain. High 81°, low 68°.

Pressure29.85 inHg

Wind10 mph SE

Humidity69%

Visibility—

Dew point69°

Thu, 1589° / 62°

0.36

89 °

Chapman, Thursday, 15 October

Rain. High 89°, low 62°.

Pressure29.80 inHg

Wind19.4 mph S

Humidity50%

Visibility—

Dew point63°

Fri, 1665° / 49°

0.02

65 °

Chapman, Friday, 16 October

Light rain. High 65°, low 49°.

Pressure30.15 inHg

Wind20.5 mph W

Humidity34%

Visibility—

Dew point28°

Sat, 1749° / 41°

49 °

Chapman, Saturday, 17 October

Overcast. High 49°, low 41°.

Pressure30.33 inHg

Wind13.8 mph NW

Humidity49%

Visibility—

Dew point28°

Sun, 1858° / 38°

58 °

Chapman, Sunday, 18 October

Clear. High 58°, low 38°.

Pressure30.33 inHg

Wind5.6 mph N

Humidity42%

Visibility—

Dew point31°

Mon, 1965° / 42°

65 °

Chapman, Monday, 19 October

Partly cloudy. High 65°, low 42°.

Pressure30.33 inHg

Wind7.3 mph E

Humidity39%

Visibility—

Dew point34°

Tue, 2068° / 44°

68 °

Chapman, Tuesday, 20 October

Clear. High 68°, low 44°.

Pressure30.33 inHg

Wind7.9 mph E

Humidity32%

Visibility—

Dew point32°

Wed, 2170° / 47°

70 °

Chapman, Wednesday, 21 October

Clear. High 70°, low 47°.

Pressure30.27 inHg

Wind6.5 mph E

Humidity32%

Visibility—

Dew point34°

Thu, 2272° / 49°

72 °

Chapman, Thursday, 22 October

Clear. High 72°, low 49°.

Pressure30.21 inHg

Wind7.2 mph NE

Humidity31%

Visibility—

Dew point35°

Fri, 2372° / 51°

72 °

Chapman, Friday, 23 October

Clear. High 72°, low 51°.

Pressure30.15 inHg

Wind7.8 mph N

Humidity40%

Visibility—

Dew point42°

Sat, 2472° / 51°

72 °

Chapman, Saturday, 24 October

Clear. High 72°, low 51°.

Pressure30.06 inHg

Wind6.3 mph NE

Humidity35%

Visibility—

Dew point39°

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.