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.

79°F

26°C

Humidity 94%
Wind Speed S 9 G 15 mph
Barometer 29.90 in
Dewpoint 77°F (25°C)
Visibility NA
Heat Index83°F (28°C)
Last update 26 Jul 7:15 am CDT
Extended Forecast for

Arion IA

Extreme Heat Watch July 26, 09:00pm until July 27, 10:00pm
Heat Advisory July 26, 07:30am until July 26, 12:00pm
Extreme Heat Warning July 26, 12:00pm until July 26, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory
Extreme Heat Warning
  •  
    Heat Advisory July 26, 07:30am until July 26, 12:00pm

    NOW until 12:00pm Sun

    Heat Advisory

  • Today

    High: 97 °F

    Hot

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between midnight and 4am. Partly cloudy, with a low around 77. South wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 77 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Sunny, with a high near 96. Heat index values as high as 103. Calm wind becoming northeast 5 to 7 mph in the afternoon.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 73. Northeast wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 91. Light northeast wind.

    High: 91 °F

    Partly Sunny

  • Tuesday Night

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

    Low: 69 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny and hot, with a high near 97. Heat index values as high as 109. West northwest wind 5 to 13 mph becoming south in the afternoon. Winds could gust as high as 21 mph.
Tonight
A slight chance of showers and thunderstorms between midnight and 4am. Partly cloudy, with a low around 77. South wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday
Sunny, with a high near 96. Heat index values as high as 103. Calm wind becoming northeast 5 to 7 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 73. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Partly sunny, with a high near 91. Light northeast wind.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Sunny, with a high near 92.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 88.
Thursday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 64.
Saturday
Sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Arion IA
 41.94°N 95.47°W
Last Update:
6:31 am CDT Jul 26, 2026
Forecast Valid:
7am CDT Jul 26, 2026-6pm CDT Aug 1, 2026
 
Forecast Discussion
 
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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