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As of 17:34 CDT

Weather in Duncan, IA

78°Current weather

Duncan, Saturday, 8 August, 17:34

Partly cloudy. Feels like 78°. High 78°, low 56°.

Pressure29.94 inHg
Wind3 mph NW
Humidity55%
Visibility6.2 mi
Dew point61°
Sun, 0982° / 66°0.22Rain
82 °Rain

Duncan, Sunday, 9 August

Rain. High 82°, low 66°.

Pressure29.80 inHg
Wind7 mph SE
Humidity64%
Visibility6.2 mi
Dew point69°
Mon, 1088° / 68°0.31Heavy rain
88 °Heavy rain

Duncan, Monday, 10 August

Heavy rain. High 88°, low 68°.

Pressure29.85 inHg
Wind11.1 mph E
Humidity83%
Visibility6.2 mi
Dew point72°
Tue, 1188° / 68°0.03Light rain
88 °Light rain

Duncan, Tuesday, 11 August

Light rain. High 88°, low 68°.

Pressure29.77 inHg
Wind4.1 mph N
Humidity50%
Visibility6.2 mi
Dew point65°
Wed, 1288° / 68°0.02Light rain
88 °Light rain

Duncan, Wednesday, 12 August

Light rain. High 88°, low 68°.

Pressure29.85 inHg
Wind10.1 mph SE
Humidity50%
Visibility6.2 mi
Dew point64°
Thu, 1377° / 60°0.32Rain
77 °Rain

Duncan, Thursday, 13 August

Rain. High 77°, low 60°.

Pressure30.00 inHg
Wind13.1 mph NE
Humidity47%
Visibility—
Dew point53°
Fri, 1479° / 54°0Clear
79 °Clear

Duncan, Friday, 14 August

Clear. High 79°, low 54°.

Pressure30.18 inHg
Wind9.7 mph SE
Humidity36%
Visibility—
Dew point45°
Sat, 1583° / 57°0Overcast
83 °Overcast

Duncan, Saturday, 15 August

Overcast. High 83°, low 57°.

Pressure30.18 inHg
Wind15.1 mph SE
Humidity37%
Visibility—
Dew point49°
Sun, 1685° / 66°0Overcast
85 °Overcast

Duncan, Sunday, 16 August

Overcast. High 85°, low 66°.

Pressure30.03 inHg
Wind14.9 mph S
Humidity52%
Visibility—
Dew point63°
Mon, 1783° / 69°0.36Rain
83 °Rain

Duncan, Monday, 17 August

Rain. High 83°, low 69°.

Pressure30.00 inHg
Wind11.3 mph N
Humidity66%
Visibility—
Dew point67°
Tue, 1892° / 67°0Light rain
92 °Light rain

Duncan, Tuesday, 18 August

Light rain. High 92°, low 67°.

Pressure29.97 inHg
Wind13.3 mph S
Humidity44%
Visibility—
Dew point61°
Wed, 1983° / 65°0.02Light rain
83 °Light rain

Duncan, Wednesday, 19 August

Light rain. High 83°, low 65°.

Pressure29.91 inHg
Wind15.9 mph N
Humidity63%
Visibility—
Dew point67°
Thu, 2083° / 61°0.03Light rain
83 °Light rain

Duncan, Thursday, 20 August

Light rain. High 83°, low 61°.

Pressure29.97 inHg
Wind11.5 mph NE
Humidity42%
Visibility—
Dew point53°
Fri, 2187° / 62°0Clear
87 °Clear

Duncan, Friday, 21 August

Clear. High 87°, low 62°.

Pressure29.94 inHg
Wind17.7 mph S
Humidity32%
Visibility—
Dew point51°
Sat, 2271° / 55°0.04Light rain
71 °Light rain

Duncan, Saturday, 22 August

Light rain. High 71°, low 55°.

Pressure30.06 inHg
Wind15.9 mph NE
Humidity72%
Visibility—
Dew point55°
Sun, 2373° / 45°0Clear
73 °Clear

Duncan, Sunday, 23 August

Clear. High 73°, low 45°.

Pressure30.21 inHg
Wind10.1 mph E
Humidity30%
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 Duncan, IA 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, IA 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.