As of 00:49 CDT

Weather in Chapman, IL

68°

Chapman, Saturday, 10 October, 00:49

Clear. Feels like 68°. High 79°, low 56°.

Pressure30.06 inHg

Wind8.1 mph SE

Humidity58%

Visibility6.2 mi

Dew point53°

See detailed hourly forecast

Sun, 1182° / 53°

82 °

Chapman, Sunday, 11 October

Clear. High 82°, low 53°.

Pressure29.97 inHg

Wind3.5 mph NW

Humidity55%

Visibility6.2 mi

Dew point57°

Mon, 1289° / 64°

89 °

Chapman, Monday, 12 October

Clear. High 89°, low 64°.

Pressure29.91 inHg

Wind10.1 mph SW

Humidity42%

Visibility6.2 mi

Dew point59°

Tue, 1390° / 70°

90 °

Chapman, Tuesday, 13 October

Clear. High 90°, low 70°.

Pressure29.88 inHg

Wind8.9 mph W

Humidity53%

Visibility6.2 mi

Dew point66°

Wed, 1476° / 67°

0.44

76 °

Chapman, Wednesday, 14 October

Rain. High 76°, low 67°.

Pressure29.97 inHg

Wind10.9 mph NE

Humidity89%

Visibility—

Dew point71°

Thu, 1572° / 58°

0.38

72 °

Chapman, Thursday, 15 October

Rain. High 72°, low 58°.

Pressure30.21 inHg

Wind11.7 mph SW

Humidity71%

Visibility—

Dew point56°

Fri, 1667° / 52°

67 °

Chapman, Friday, 16 October

Overcast. High 67°, low 52°.

Pressure29.97 inHg

Wind20.5 mph W

Humidity46%

Visibility—

Dew point45°

Sat, 1750° / 39°

50 °

Chapman, Saturday, 17 October

Overcast. High 50°, low 39°.

Pressure30.36 inHg

Wind22 mph NW

Humidity45%

Visibility—

Dew point27°

Sun, 1854° / 33°

54 °

Chapman, Sunday, 18 October

Clear. High 54°, low 33°.

Pressure30.45 inHg

Wind8.5 mph S

Humidity30%

Visibility—

Dew point19°

Mon, 1962° / 38°

62 °

Chapman, Monday, 19 October

Overcast. High 62°, low 38°.

Pressure30.36 inHg

Wind7.6 mph SE

Humidity29%

Visibility—

Dew point25°

Tue, 2068° / 46°

68 °

Chapman, Tuesday, 20 October

Overcast. High 68°, low 46°.

Pressure30.24 inHg

Wind13.8 mph S

Humidity34%

Visibility—

Dew point34°

Wed, 2164° / 52°

0.05

64 °

Chapman, Wednesday, 21 October

Light rain. High 64°, low 52°.

Pressure30.03 inHg

Wind17.9 mph SE

Humidity69%

Visibility—

Dew point52°

Thu, 2260° / 55°

1.36

60 °

Chapman, Thursday, 22 October

Heavy rain. High 60°, low 55°.

Pressure29.68 inHg

Wind19 mph SE

Humidity94%

Visibility—

Dew point54°

Fri, 2368° / 51°

68 °

Chapman, Friday, 23 October

Clear. High 68°, low 51°.

Pressure29.97 inHg

Wind12.7 mph NW

Humidity61%

Visibility—

Dew point50°

Sat, 2460° / 47°

60 °

Chapman, Saturday, 24 October

Overcast. High 60°, low 47°.

Pressure30.03 inHg

Wind15.8 mph NW

Humidity50%

Visibility—

Dew point40°

Sun, 2558° / 42°

58 °

Chapman, Sunday, 25 October

Overcast. High 58°, low 42°.

Pressure29.97 inHg

Wind12.4 mph SW

Humidity42%

Visibility—

Dew point33°

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.