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.

Mostly Cloudy

59°F

15°C

Humidity 94%
Wind Speed E 5 mph
Barometer 30.26 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 16 Sep 2:15 am CDT
Extended Forecast for

Denison IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 56. East northeast wind around 6 mph.

    Low: 56 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers before 9am, then a slight chance of showers after 1pm. Mostly cloudy, with a high near 71. East wind 5 to 8 mph. Chance of precipitation is 20%.

    High: 71 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 67. Light and variable wind. Chance of precipitation is 30%. 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
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 77. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.

    High: 77 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. East northeast wind 5 to 8 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 83. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.

    Low: 64 °F

    Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 75.

    High: 75 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 56. East northeast wind around 6 mph.
Wednesday
A slight chance of showers before 9am, then a slight chance of showers after 1pm. Mostly cloudy, with a high near 71. East wind 5 to 8 mph. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 67. Light and variable wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A 30 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 77. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. East northeast wind 5 to 8 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 83. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 75.
Saturday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 57.
Sunday
A chance of showers and thunderstorms. Cloudy, with a high near 68. Chance of precipitation is 50%.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 55.
Monday
A 30 percent chance of showers. Mostly cloudy, with a high near 68.
Monday Night
Partly cloudy, with a low around 53.
Tuesday
Partly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Denison IA
 42.03°N 95.35°W
Last Update:
1:43 am CDT Sep 16, 2026
Forecast Valid:
2am CDT Sep 16, 2026-6pm CDT Sep 22, 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