As of 09:37 CDT

Weather in Chapin, IL

63°

Chapin, Sunday, 11 October, 09:37

Clear. Feels like 62°. High 82°, low 53°.

Pressure30.00 inHg

Wind0 mph N

Humidity77%

Visibility6.2 mi

Dew point55°

See detailed hourly forecast

Mon, 1290° / 62°

90 °

Chapin, Monday, 12 October

Mostly clear. High 90°, low 62°.

Pressure29.88 inHg

Wind12.2 mph SW

Humidity47%

Visibility6.2 mi

Dew point62°

Tue, 1391° / 70°

91 °

Chapin, Tuesday, 13 October

Light rain. High 91°, low 70°.

Pressure29.88 inHg

Wind9.1 mph W

Humidity52%

Visibility6.2 mi

Dew point67°

Wed, 1475° / 70°

0.59

75 °

Chapin, Wednesday, 14 October

Rain. High 75°, low 70°.

Pressure30.00 inHg

Wind3.2 mph NE

Humidity83%

Visibility6.2 mi

Dew point71°

Thu, 1578° / 66°

0.28

78 °

Chapin, Thursday, 15 October

Rain. High 78°, low 66°.

Pressure30.00 inHg

Wind9.7 mph E

Humidity97%

Visibility—

Dew point71°

Fri, 1666° / 52°

0.08

66 °

Chapin, Friday, 16 October

Light rain. High 66°, low 52°.

Pressure30.39 inHg

Wind16.5 mph N

Humidity46%

Visibility—

Dew point39°

Sat, 1747° / 34°

47 °

Chapin, Saturday, 17 October

Clear. High 47°, low 34°.

Pressure30.59 inHg

Wind12 mph N

Humidity22%

Visibility—

Dew point7°

Sun, 1858° / 32°

58 °

Chapin, Sunday, 18 October

Clear. High 58°, low 32°.

Pressure30.47 inHg

Wind16.7 mph S

Humidity19%

Visibility—

Dew point10°

Mon, 1968° / 40°

68 °

Chapin, Monday, 19 October

Clear. High 68°, low 40°.

Pressure30.36 inHg

Wind15.1 mph SW

Humidity20%

Visibility—

Dew point20°

Tue, 2069° / 45°

69 °

Chapin, Tuesday, 20 October

Overcast. High 69°, low 45°.

Pressure30.30 inHg

Wind11.3 mph S

Humidity22%

Visibility—

Dew point25°

Wed, 2173° / 50°

73 °

Chapin, Wednesday, 21 October

Overcast. High 73°, low 50°.

Pressure30.21 inHg

Wind12.5 mph S

Humidity21%

Visibility—

Dew point27°

Thu, 2275° / 55°

0.03

75 °

Chapin, Thursday, 22 October

Light rain. High 75°, low 55°.

Pressure30.21 inHg

Wind9.1 mph S

Humidity28%

Visibility—

Dew point37°

Fri, 2380° / 57°

80 °

Chapin, Friday, 23 October

Mostly clear. High 80°, low 57°.

Pressure30.12 inHg

Wind9.8 mph SW

Humidity32%

Visibility—

Dew point43°

Sat, 2478° / 59°

78 °

Chapin, Saturday, 24 October

Clear. High 78°, low 59°.

Pressure30.12 inHg

Wind6.6 mph E

Humidity50%

Visibility—

Dew point54°

Sun, 2582° / 60°

0.2

82 °

Chapin, Sunday, 25 October

Rain. High 82°, low 60°.

Pressure29.91 inHg

Wind24 mph NW

Humidity43%

Visibility—

Dew point54°

Mon, 2656° / 47°

56 °

Chapin, Monday, 26 October

Overcast. High 56°, low 47°.

Pressure29.94 inHg

Wind17.5 mph NW

Humidity45%

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 Chapin, 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 Chapin, 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.