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.

Fair

84°F

29°C

Humidity 62%
Wind Speed SE 9 mph
Barometer 29.85 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 12 Aug 12:55 pm CDT
Extended Forecast for

Denison IA

  • This Afternoon

    This Afternoon: Patchy smoke after 3pm. Mostly sunny, with a high near 88. East northeast wind around 8 mph.

    High: 88 °F

    Patchy Smoke

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Patchy smoke before 10pm. Low around 67. East wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 67 °F

    Patchy Smoke
    then Showers

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 1pm. Some of the storms could produce heavy rainfall. High near 80. East wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 80 °F

    Heavy Rain
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly before 11pm, then showers likely and possibly a thunderstorm after 2am. Increasing clouds, with a low around 65. East wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.

    Low: 65 °F

    Showers
    Likely

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms before 1pm. Cloudy, with a high near 81. East wind 8 to 10 mph, with gusts as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 67. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83.

    High: 83 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 77.

    High: 77 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Patchy smoke after 3pm. Mostly sunny, with a high near 88. East northeast wind around 8 mph.
Tonight
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Patchy smoke before 10pm. Low around 67. East wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
Showers and thunderstorms, mainly before 1pm. Some of the storms could produce heavy rainfall. High near 80. East wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers and thunderstorms likely, mainly before 11pm, then showers likely and possibly a thunderstorm after 2am. Increasing clouds, with a low around 65. East wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
Friday
A 30 percent chance of showers and thunderstorms before 1pm. Cloudy, with a high near 81. East wind 8 to 10 mph, with gusts as high as 20 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 67. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Sunday
A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 77.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Partly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Partly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Denison IA
 42.03°N 95.38°W
Last Update:
12:27 pm CDT Aug 12, 2026
Forecast Valid:
1pm CDT Aug 12, 2026-6pm CDT Aug 18, 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