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As of 02:41 CDT

Weather in Duncan, IL

73°Current weather

Duncan, Tuesday, 13 October, 02:41

Clear. Feels like 73°. High 83°, low 66°.

Pressure29.80 inHg
Wind12.9 mph SW
Humidity57%
Visibility6.2 mi
Dew point57°
Wed, 1475° / 61°0.15Rain
75 °Rain

Duncan, Wednesday, 14 October

Rain. High 75°, low 61°.

Pressure30.06 inHg
Wind8.4 mph NE
Humidity65%
Visibility6.2 mi
Dew point57°
Thu, 1564° / 58°1.18Heavy rain
64 °Heavy rain

Duncan, Thursday, 15 October

Heavy rain. High 64°, low 58°.

Pressure30.00 inHg
Wind7.9 mph NE
Humidity96%
Visibility1.2 mi
Dew point59°
Fri, 1658° / 47°0Overcast
58 °Overcast

Duncan, Friday, 16 October

Overcast. High 58°, low 47°.

Pressure30.30 inHg
Wind22.1 mph NW
Humidity50%
Visibility6.2 mi
Dew point36°
Sat, 1759° / 39°0Clear
59 °Clear

Duncan, Saturday, 17 October

Clear. High 59°, low 39°.

Pressure30.47 inHg
Wind9.4 mph SW
Humidity41%
Visibility—
Dew point31°
Sun, 1864° / 46°0Overcast
64 °Overcast

Duncan, Sunday, 18 October

Overcast. High 64°, low 46°.

Pressure30.24 inHg
Wind13.5 mph S
Humidity46%
Visibility—
Dew point38°
Mon, 1960° / 47°0.06Light rain
60 °Light rain

Duncan, Monday, 19 October

Light rain. High 60°, low 47°.

Pressure30.21 inHg
Wind7.9 mph S
Humidity53%
Visibility—
Dew point41°
Tue, 2068° / 52°0.13Light rain
68 °Light rain

Duncan, Tuesday, 20 October

Light rain. High 68°, low 52°.

Pressure30.18 inHg
Wind10.4 mph SE
Humidity92%
Visibility—
Dew point57°
Wed, 2171° / 59°0Overcast
71 °Overcast

Duncan, Wednesday, 21 October

Overcast. High 71°, low 59°.

Pressure30.15 inHg
Wind13.1 mph S
Humidity72%
Visibility—
Dew point59°
Thu, 2276° / 62°0.02Light rain
76 °Light rain

Duncan, Thursday, 22 October

Light rain. High 76°, low 62°.

Pressure29.97 inHg
Wind23 mph S
Humidity62%
Visibility—
Dew point59°
Fri, 2366° / 51°0.22Light rain
66 °Light rain

Duncan, Friday, 23 October

Light rain. High 66°, low 51°.

Pressure30.06 inHg
Wind28 mph S
Humidity54%
Visibility—
Dew point43°
Sat, 2460° / 47°0Overcast
60 °Overcast

Duncan, Saturday, 24 October

Overcast. High 60°, low 47°.

Pressure30.36 inHg
Wind11.4 mph NW
Humidity43%
Visibility—
Dew point35°
Sun, 2554° / 42°0Partly cloudy
54 °Partly cloudy

Duncan, Sunday, 25 October

Partly cloudy. High 54°, low 42°.

Pressure30.30 inHg
Wind8.2 mph W
Humidity46%
Visibility—
Dew point32°
Mon, 2657° / 42°0.01Light rain
57 °Light rain

Duncan, Monday, 26 October

Light rain. High 57°, low 42°.

Pressure30.06 inHg
Wind10.6 mph W
Humidity58%
Visibility—
Dew point40°
Tue, 2761° / 43°0.02Light rain
61 °Light rain

Duncan, Tuesday, 27 October

Light rain. High 61°, low 43°.

Pressure29.65 inHg
Wind16.6 mph NW
Humidity62%
Visibility—
Dew point46°
Wed, 2853° / 45°0Partly cloudy
53 °Partly cloudy

Duncan, Wednesday, 28 October

Partly cloudy. High 53°, low 45°.

Pressure29.85 inHg
Wind16.2 mph NW
Humidity51%
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.