As of 07:12 CDT

Weather in Duncan, IL

62°

Duncan, Saturday, 10 October, 07:12

Clear. Feels like 61°. High 81°, low 59°.

Pressure30.06 inHg

Wind8.8 mph S

Humidity60%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Sun, 1179° / 55°

79 °

Duncan, Sunday, 11 October

Clear. High 79°, low 55°.

Pressure29.97 inHg

Wind6.2 mph S

Humidity56%

Visibility6.2 mi

Dew point57°

Mon, 1285° / 64°

85 °

Duncan, Monday, 12 October

Partly cloudy. High 85°, low 64°.

Pressure29.83 inHg

Wind12 mph SW

Humidity53%

Visibility6.2 mi

Dew point62°

Tue, 1382° / 69°

82 °

Duncan, Tuesday, 13 October

Clear. High 82°, low 69°.

Pressure29.83 inHg

Wind7.9 mph W

Humidity62%

Visibility6.2 mi

Dew point66°

Wed, 1471° / 60°

0.3

71 °

Duncan, Wednesday, 14 October

Rain. High 71°, low 60°.

Pressure30.09 inHg

Wind11.4 mph NE

Humidity58%

Visibility—

Dew point54°

Thu, 1559° / 55°

0.11

59 °

Duncan, Thursday, 15 October

Light rain. High 59°, low 55°.

Pressure30.33 inHg

Wind12.7 mph E

Humidity65%

Visibility—

Dew point46°

Fri, 1662° / 49°

62 °

Duncan, Friday, 16 October

Overcast. High 62°, low 49°.

Pressure29.94 inHg

Wind18.1 mph W

Humidity41%

Visibility—

Dew point36°

Sat, 1746° / 39°

0.05

46 °

Duncan, Saturday, 17 October

Light rain. High 46°, low 39°.

Pressure30.18 inHg

Wind17.4 mph W

Humidity95%

Visibility—

Dew point38°

Sun, 1847° / 31°

47 °

Duncan, Sunday, 18 October

Clear. High 47°, low 31°.

Pressure30.50 inHg

Wind13.8 mph N

Humidity46%

Visibility—

Dew point24°

Mon, 1953° / 34°

53 °

Duncan, Monday, 19 October

Overcast. High 53°, low 34°.

Pressure30.39 inHg

Wind10.7 mph S

Humidity47%

Visibility—

Dew point29°

Tue, 2060° / 39°

60 °

Duncan, Tuesday, 20 October

Overcast. High 60°, low 39°.

Pressure30.30 inHg

Wind11.5 mph S

Humidity40%

Visibility—

Dew point31°

Wed, 2164° / 42°

64 °

Duncan, Wednesday, 21 October

Clear. High 64°, low 42°.

Pressure30.27 inHg

Wind11.6 mph S

Humidity36%

Visibility—

Dew point32°

Thu, 2269° / 46°

69 °

Duncan, Thursday, 22 October

Clear. High 69°, low 46°.

Pressure30.09 inHg

Wind16.2 mph S

Humidity38%

Visibility—

Dew point38°

Fri, 2363° / 53°

0.01

63 °

Duncan, Friday, 23 October

Light rain. High 63°, low 53°.

Pressure29.97 inHg

Wind8.9 mph S

Humidity68%

Visibility—

Dew point49°

Sat, 2463° / 48°

0.06

63 °

Duncan, Saturday, 24 October

Light rain. High 63°, low 48°.

Pressure29.77 inHg

Wind16.2 mph NW

Humidity55%

Visibility—

Dew point44°

Sun, 2555° / 42°

55 °

Duncan, Sunday, 25 October

Clear. High 55°, low 42°.

Pressure29.88 inHg

Wind18.3 mph W

Humidity48%

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 Duncan, 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 Duncan, 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.