Dangerous Heat in the Southwest; Severe Thunderstorms from the Central Plains into the Ohio Valley

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Isolated to widely scattered severe storms are expected across parts of the central and southern High Plains, Great Lakes into the Ohio Valley, and parts of the Ozarks to Lower Mississippi Valley today. Read More >

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

A Few Clouds

82°F

28°C

Humidity 51%
Wind Speed N 10 G 20 mph
Barometer 30.06 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 26 Aug 3:15 pm CDT
Extended Forecast for

Denison IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 82. Northwest wind 9 to 11 mph, with gusts as high as 18 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 58. Light north wind.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83. Light north wind.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 85. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 68. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms before 1pm.  Mostly sunny, with a high near 89. Breezy.

    High: 89 °F

    Chance
    T-storms and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 95.

    High: 95 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 82. Northwest wind 9 to 11 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 58. Light north wind.
Thursday
Sunny, with a high near 83. Light north wind.
Thursday Night
Mostly clear, with a low around 59. Calm wind.
Friday
Mostly sunny, with a high near 85. Calm wind becoming south 5 to 8 mph in the afternoon.
Friday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 40 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 89. Breezy.
Saturday Night
Partly cloudy, with a low around 74.
Sunday
Partly sunny, with a high near 95.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 91.
Monday Night
A 30 percent chance of showers. Partly cloudy, with a low around 67.
Tuesday
Partly sunny, with a high near 88.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Denison IA
 42.03°N 95.35°W
1:43 pm CDT Aug 26, 2026
3pm CDT Aug 26, 2026-6pm CDT Sep 1, 2026
 
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