As of 18:20 CDT

Weather in Decorra, IL

80°

Decorra, Sunday, 11 October, 18:20

Clear. Feels like 80°. High 82°, low 54°.

Pressure29.88 inHg

Wind4.6 mph S

Humidity56%

Visibility6.2 mi

Dew point63°

See detailed hourly forecast

Mon, 1288° / 64°

88 °

Decorra, Monday, 12 October

Partly cloudy. High 88°, low 64°.

Pressure29.83 inHg

Wind13.2 mph SW

Humidity56%

Visibility6.2 mi

Dew point64°

Tue, 1382° / 64°

0.04

82 °

Decorra, Tuesday, 13 October

Light rain. High 82°, low 64°.

Pressure29.88 inHg

Wind3.9 mph W

Humidity66%

Visibility6.2 mi

Dew point66°

Wed, 1472° / 63°

0.63

72 °

Decorra, Wednesday, 14 October

Heavy rain. High 72°, low 63°.

Pressure30.06 inHg

Wind8.7 mph NE

Humidity69%

Visibility6.2 mi

Dew point60°

Thu, 1571° / 61°

0.96

71 °

Decorra, Thursday, 15 October

Heavy rain. High 71°, low 61°.

Pressure29.94 inHg

Wind1 mph W

Humidity97%

Visibility1.9 mi

Dew point68°

Fri, 1660° / 49°

60 °

Decorra, Friday, 16 October

Overcast. High 60°, low 49°.

Pressure30.50 inHg

Wind16.3 mph N

Humidity48%

Visibility—

Dew point38°

Sat, 1751° / 39°

51 °

Decorra, Saturday, 17 October

Clear. High 51°, low 39°.

Pressure30.62 inHg

Wind7.7 mph S

Humidity38%

Visibility—

Dew point25°

Sun, 1859° / 36°

59 °

Decorra, Sunday, 18 October

Clear. High 59°, low 36°.

Pressure30.42 inHg

Wind18.7 mph SW

Humidity33%

Visibility—

Dew point25°

Mon, 1965° / 41°

65 °

Decorra, Monday, 19 October

Clear. High 65°, low 41°.

Pressure30.36 inHg

Wind13.1 mph SW

Humidity31%

Visibility—

Dew point29°

Tue, 2069° / 53°

69 °

Decorra, Tuesday, 20 October

Overcast. High 69°, low 53°.

Pressure30.24 inHg

Wind11.8 mph S

Humidity40%

Visibility—

Dew point40°

Wed, 2165° / 58°

0.1

65 °

Decorra, Wednesday, 21 October

Light rain. High 65°, low 58°.

Pressure30.12 inHg

Wind17.7 mph S

Humidity82%

Visibility—

Dew point55°

Thu, 2271° / 63°

0.18

71 °

Decorra, Thursday, 22 October

Light rain. High 71°, low 63°.

Pressure30.15 inHg

Wind17.7 mph S

Humidity65%

Visibility—

Dew point58°

Fri, 2364° / 62°

0.94

64 °

Decorra, Friday, 23 October

Rain. High 64°, low 62°.

Pressure30.03 inHg

Wind16.7 mph S

Humidity94%

Visibility—

Dew point60°

Sat, 2463° / 44°

0.21

63 °

Decorra, Saturday, 24 October

Rain. High 63°, low 44°.

Pressure30.15 inHg

Wind13.8 mph N

Humidity84%

Visibility—

Dew point44°

Sun, 2552° / 39°

52 °

Decorra, Sunday, 25 October

Overcast. High 52°, low 39°.

Pressure30.21 inHg

Wind10.6 mph NW

Humidity57%

Visibility—

Dew point35°

Mon, 2653° / 39°

53 °

Decorra, Monday, 26 October

Clear. High 53°, low 39°.

Pressure30.06 inHg

Wind18.1 mph NW

Humidity50%

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 Decorra, 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 Decorra, 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.