As of 19:33 CDT

Weather in Chapin, IL

81°

Chapin, Monday, 12 October, 19:33

Clear. Feels like 82°. High 90°, low 64°.

Pressure29.80 inHg

Wind8.1 mph S

Humidity51%

Visibility6.2 mi

Dew point61°

See detailed hourly forecast

Tue, 1392° / 66°

92 °

Chapin, Tuesday, 13 October

Clear. High 92°, low 66°.

Pressure29.85 inHg

Wind8.2 mph SW

Humidity53%

Visibility6.2 mi

Dew point67°

Wed, 1472° / 67°

0.25

72 °

Chapin, Wednesday, 14 October

Rain. High 72°, low 67°.

Pressure30.00 inHg

Wind5.1 mph NE

Humidity91%

Visibility2.2 mi

Dew point68°

Thu, 1579° / 67°

0.96

79 °

Chapin, Thursday, 15 October

Heavy rain. High 79°, low 67°.

Pressure29.97 inHg

Wind10 mph S

Humidity94%

Visibility4.8 mi

Dew point71°

Fri, 1661° / 49°

0.02

61 °

Chapin, Friday, 16 October

Light rain. High 61°, low 49°.

Pressure30.36 inHg

Wind19.1 mph N

Humidity45%

Visibility6.2 mi

Dew point36°

Sat, 1761° / 42°

61 °

Chapin, Saturday, 17 October

Clear. High 61°, low 42°.

Pressure30.50 inHg

Wind7.8 mph S

Humidity39%

Visibility—

Dew point32°

Sun, 1867° / 44°

67 °

Chapin, Sunday, 18 October

Clear. High 67°, low 44°.

Pressure30.30 inHg

Wind11.4 mph S

Humidity33%

Visibility—

Dew point33°

Mon, 1971° / 48°

71 °

Chapin, Monday, 19 October

Overcast. High 71°, low 48°.

Pressure30.27 inHg

Wind9 mph SW

Humidity40%

Visibility—

Dew point41°

Tue, 2076° / 60°

76 °

Chapin, Tuesday, 20 October

Overcast. High 76°, low 60°.

Pressure30.24 inHg

Wind8.9 mph S

Humidity51%

Visibility—

Dew point53°

Wed, 2178° / 58°

78 °

Chapin, Wednesday, 21 October

Clear. High 78°, low 58°.

Pressure30.15 inHg

Wind11.6 mph SE

Humidity49%

Visibility—

Dew point54°

Thu, 2280° / 63°

80 °

Chapin, Thursday, 22 October

Overcast. High 80°, low 63°.

Pressure30.06 inHg

Wind15.4 mph S

Humidity45%

Visibility—

Dew point53°

Fri, 2382° / 68°

82 °

Chapin, Friday, 23 October

Overcast. High 82°, low 68°.

Pressure29.91 inHg

Wind18.9 mph S

Humidity40%

Visibility—

Dew point50°

Sat, 2473° / 52°

0.15

73 °

Chapin, Saturday, 24 October

Rain. High 73°, low 52°.

Pressure29.85 inHg

Wind19 mph SW

Humidity51%

Visibility—

Dew point43°

Sun, 2557° / 45°

57 °

Chapin, Sunday, 25 October

Overcast. High 57°, low 45°.

Pressure30.09 inHg

Wind11.8 mph NW

Humidity49%

Visibility—

Dew point36°

Mon, 2664° / 42°

64 °

Chapin, Monday, 26 October

Clear. High 64°, low 42°.

Pressure30.18 inHg

Wind7.3 mph SE

Humidity41%

Visibility—

Dew point34°

Tue, 2771° / 47°

71 °

Chapin, Tuesday, 27 October

Overcast. High 71°, low 47°.

Pressure29.91 inHg

Wind13.6 mph SW

Humidity37%

Visibility—

Dew point38°

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.