As of 03:55 CDT

Weather in Chapman, IL

70°

Chapman, Thursday, 15 October, 03:55

Overcast. Feels like 71°. High 80°, low 68°.

Pressure30.03 inHg

Wind7.7 mph E

Humidity92%

Visibility6.2 mi

Dew point67°

See detailed hourly forecast

Fri, 1662° / 50°

0.11

62 °

Chapman, Friday, 16 October

Rain. High 62°, low 50°.

Pressure30.15 inHg

Wind18 mph NW

Humidity50%

Visibility6.2 mi

Dew point37°

Sat, 1757° / 42°

57 °

Chapman, Saturday, 17 October

Clear. High 57°, low 42°.

Pressure30.56 inHg

Wind3.5 mph N

Humidity52%

Visibility6.2 mi

Dew point36°

Sun, 1861° / 41°

61 °

Chapman, Sunday, 18 October

Clear. High 61°, low 41°.

Pressure30.50 inHg

Wind7.8 mph S

Humidity42%

Visibility6.2 mi

Dew point35°

Mon, 1965° / 42°

65 °

Chapman, Monday, 19 October

Overcast. High 65°, low 42°.

Pressure30.39 inHg

Wind4.5 mph SE

Humidity42%

Visibility—

Dew point38°

Tue, 2069° / 46°

69 °

Chapman, Tuesday, 20 October

Clear. High 69°, low 46°.

Pressure30.30 inHg

Wind3.4 mph SE

Humidity43%

Visibility—

Dew point41°

Wed, 2173° / 54°

73 °

Chapman, Wednesday, 21 October

Clear. High 73°, low 54°.

Pressure30.30 inHg

Wind6.4 mph E

Humidity37%

Visibility—

Dew point42°

Thu, 2274° / 52°

74 °

Chapman, Thursday, 22 October

Overcast. High 74°, low 52°.

Pressure30.27 inHg

Wind8.2 mph SE

Humidity29%

Visibility—

Dew point35°

Fri, 2375° / 53°

75 °

Chapman, Friday, 23 October

Overcast. High 75°, low 53°.

Pressure30.15 inHg

Wind15.5 mph S

Humidity34%

Visibility—

Dew point42°

Sat, 2462° / 55°

0.97

62 °

Chapman, Saturday, 24 October

Rain. High 62°, low 55°.

Pressure30.18 inHg

Wind11.1 mph S

Humidity85%

Visibility—

Dew point51°

Sun, 2562° / 46°

0.2

62 °

Chapman, Sunday, 25 October

Rain. High 62°, low 46°.

Pressure30.21 inHg

Wind16.1 mph NW

Humidity49%

Visibility—

Dew point39°

Mon, 2657° / 40°

57 °

Chapman, Monday, 26 October

Clear. High 57°, low 40°.

Pressure30.36 inHg

Wind8.4 mph NW

Humidity31%

Visibility—

Dew point23°

Tue, 2755° / 42°

55 °

Chapman, Tuesday, 27 October

Overcast. High 55°, low 42°.

Pressure30.24 inHg

Wind11.5 mph NW

Humidity40%

Visibility—

Dew point29°

Wed, 2861° / 38°

61 °

Chapman, Wednesday, 28 October

Clear. High 61°, low 38°.

Pressure30.18 inHg

Wind12.4 mph SW

Humidity42%

Visibility—

Dew point32°

Thu, 2967° / 46°

67 °

Chapman, Thursday, 29 October

Mostly clear. High 67°, low 46°.

Pressure30.03 inHg

Wind11.2 mph W

Humidity40%

Visibility—

Dew point38°

Fri, 3047° / 38°

47 °

Chapman, Friday, 30 October

Mostly clear. High 47°, low 38°.

Pressure30.45 inHg

Wind18.4 mph N

Humidity28%

Visibility—

Dew point14°

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.