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

Air Quality Concerns; Fire Weather; Extreme Heat; Flash Flooding

Wildfire smoke continues to result in poor air quality from the Upper Midwest into the Northeast. Dangerous heat and fire weather concerns for portions of the Four Corners region into the central Great Basin. Heavy rainfall and flash flooding possible for the Southeast through Monday. For Hawaii, gusty trade winds a drier weather could result in any fires that start to spread rapidly. Read More >

Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

Fair

N/A

Humidity NA
Wind Speed E 5 mph
Barometer 30.11 in
Dewpoint N/A
Visibility 10.00 mi
Last update 4 Aug 2:15 am CDT
Extended Forecast for

Defiance IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 78. Calm wind becoming south southeast 5 to 7 mph in the morning.

    High: 78 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 57. South southeast wind around 6 mph becoming calm in the evening.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. Light south southeast wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 17 mph.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63. Southeast wind 6 to 8 mph.

    Low: 63 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85. South southeast wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 67. South wind around 7 mph.

    Low: 67 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 88. South wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 71. South wind around 10 mph, with gusts as high as 17 mph.

    Low: 71 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 56. Calm wind.
Monday
Partly sunny, with a high near 78. Calm wind becoming south southeast 5 to 7 mph in the morning.
Monday Night
Partly cloudy, with a low around 57. South southeast wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 80. Light south southeast wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 17 mph.
Tuesday Night
Partly cloudy, with a low around 63. Southeast wind 6 to 8 mph.
Wednesday
Mostly sunny, with a high near 85. South southeast wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 67. South wind around 7 mph.
Thursday
Sunny, with a high near 88. South wind 6 to 11 mph, with gusts as high as 18 mph.
Thursday Night
Mostly clear, with a low around 71. South wind around 10 mph, with gusts as high as 17 mph.
Friday
Mostly sunny, with a high near 90. South wind 10 to 14 mph, with gusts as high as 22 mph.
Friday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. South southeast wind around 10 mph, with gusts as high as 18 mph.
Saturday
Mostly sunny, with a high near 89. South wind 9 to 11 mph, with gusts as high as 20 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. South southeast wind 6 to 9 mph, with gusts as high as 16 mph.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. South southwest wind 6 to 8 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Defiance IA
 41.83°N 95.35°W (Elev. 1293 ft)
Last Update:
1:35 am CDT Aug 4, 2025
Forecast Valid:
2am CDT Aug 4, 2025-6pm CDT Aug 10, 2025
 
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