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As of 14:26 CDT

Weather in Denison, IA

78°Current weather

Denison, Saturday, 8 August, 14:26

Clear. Feels like 79°. High 80°, low 60°.

Pressure30.03 inHg
Wind9.5 mph S
Humidity62%
Visibility6.2 mi
Dew point63°
Sun, 0994° / 72°0Overcast
94 °Overcast

Denison, Sunday, 9 August

Overcast. High 94°, low 72°.

Pressure29.74 inHg
Wind9.4 mph W
Humidity29%
Visibility6.2 mi
Dew point59°
Mon, 10100° / 71°0Light rain
100 °Light rain

Denison, Monday, 10 August

Light rain. High 100°, low 71°.

Pressure29.77 inHg
Wind11.6 mph SE
Humidity26%
Visibility6.2 mi
Dew point56°
Tue, 11106° / 69°0.02Light rain
106 °Light rain

Denison, Tuesday, 11 August

Light rain. High 106°, low 69°.

Pressure29.74 inHg
Wind7.5 mph N
Humidity34%
Visibility6.2 mi
Dew point60°
Wed, 1296° / 69°0.09Light rain
96 °Light rain

Denison, Wednesday, 12 August

Light rain. High 96°, low 69°.

Pressure29.83 inHg
Wind13.7 mph SE
Humidity42%
Visibility6.2 mi
Dew point66°
Thu, 1387° / 66°0.14Light rain
87 °Light rain

Denison, Thursday, 13 August

Light rain. High 87°, low 66°.

Pressure29.94 inHg
Wind16.3 mph E
Humidity42%
Visibility—
Dew point56°
Fri, 1487° / 58°0Overcast
87 °Overcast

Denison, Friday, 14 August

Overcast. High 87°, low 58°.

Pressure30.18 inHg
Wind12.6 mph SE
Humidity23%
Visibility—
Dew point39°
Sat, 1584° / 59°0Overcast
84 °Overcast

Denison, Saturday, 15 August

Overcast. High 84°, low 59°.

Pressure30.15 inHg
Wind17.6 mph S
Humidity44%
Visibility—
Dew point56°
Sun, 1694° / 66°0Overcast
94 °Overcast

Denison, Sunday, 16 August

Overcast. High 94°, low 66°.

Pressure29.97 inHg
Wind14.5 mph S
Humidity48%
Visibility—
Dew point65°
Mon, 17100° / 71°0.01Light rain
100 °Light rain

Denison, Monday, 17 August

Light rain. High 100°, low 71°.

Pressure29.94 inHg
Wind10.5 mph E
Humidity43%
Visibility—
Dew point66°
Tue, 18100° / 69°0Overcast
100 °Overcast

Denison, Tuesday, 18 August

Overcast. High 100°, low 69°.

Pressure29.94 inHg
Wind14.8 mph S
Humidity33%
Visibility—
Dew point58°
Wed, 19104° / 69°1.6Heavy rain
104 °Heavy rain

Denison, Wednesday, 19 August

Heavy rain. High 104°, low 69°.

Pressure29.83 inHg
Wind16.5 mph E
Humidity33%
Visibility—
Dew point60°
Thu, 2084° / 64°0.14Light rain
84 °Light rain

Denison, Thursday, 20 August

Light rain. High 84°, low 64°.

Pressure29.97 inHg
Wind13.3 mph NE
Humidity57%
Visibility—
Dew point61°
Fri, 2188° / 64°0Mostly clear
88 °Mostly clear

Denison, Friday, 21 August

Mostly clear. High 88°, low 64°.

Pressure29.94 inHg
Wind12.8 mph S
Humidity40%
Visibility—
Dew point56°
Sat, 2276° / 64°0.05Light rain
76 °Light rain

Denison, Saturday, 22 August

Light rain. High 76°, low 64°.

Pressure29.97 inHg
Wind17.5 mph NE
Humidity67%
Visibility—
Dew point63°
Sun, 2378° / 51°0Clear
78 °Clear

Denison, Sunday, 23 August

Clear. High 78°, low 51°.

Pressure30.18 inHg
Wind12.9 mph E
Humidity30%
Visibility—
Dew point37°

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 Denison, 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 Denison, 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.