National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

77°F

25°C

Humidity 94%
Wind Speed S 5 mph
Barometer 29.77 in
Dewpoint 75°F (24°C)
Visibility NA
Heat Index78°F (26°C)
Last update 27 Jul 6:15 am CDT
Extended Forecast for

Denison IA

Heat Advisory July 27, 06:38am until July 27, 10:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 27, 06:38am until July 27, 10:00pm

    NOW until 10:00pm Mon

    Heat Advisory

  • Today

    High: 97 °F

    Sunny then
    Patchy Smoke

  • Tonight

    Tonight: Areas of smoke. Mostly cloudy, with a low around 72. Northeast wind around 5 mph becoming light and variable in the evening.

    Low: 72 °F

    Areas Smoke

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 88. Light east wind.

    High: 88 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 90. Calm wind becoming south southeast around 6 mph in the morning.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 87.

    High: 87 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.

    Low: 67 °F

    Heavy Rain

Detailed Forecast

Today
Patchy smoke after 4pm. Sunny and hot, with a high near 97. Heat index values as high as 107. South wind 6 to 8 mph becoming north in the afternoon.
Tonight
Areas of smoke. Mostly cloudy, with a low around 72. Northeast wind around 5 mph becoming light and variable in the evening.
Tuesday
Mostly cloudy, with a high near 88. Light east wind.
Tuesday Night
Partly cloudy, with a low around 67. Calm wind.
Wednesday
Sunny, with a high near 90. Calm wind becoming south southeast around 6 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 87.
Thursday Night
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.
Friday
A 30 percent chance of showers before 1pm. Partly sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Mostly sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Sunny, with a high near 85.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Denison IA
 42.03°N 95.35°W
Last Update:
4:01 am CDT Jul 27, 2026
Forecast Valid:
6am CDT Jul 27, 2026-6pm CDT Aug 2, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation