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Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

Fair

59°F

15°C

Humidity 68%
Wind Speed SE 15 mph
Barometer 30.10 in
Dewpoint 48°F (9°C)
Visibility NA
Last update 21 May 5:55 pm CDT
Extended Forecast for

Denison IA

  • Tonight

    Tonight: A slight chance of showers between 11pm and 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 46. East wind 7 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 65. Breezy, with a southeast wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 65 °F

    Showers
    Likely then
    Chance
    T-storms and
    Breezy

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Cloudy, then gradually becoming partly cloudy, with a low around 48. South southeast wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 71. Calm wind becoming northwest around 6 mph in the morning.

    High: 71 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 48. Light and variable wind.

    Low: 48 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms. Mostly clear, with a low around 54. Chance of precipitation is 20%.

    Low: 54 °F

    Slight Chance
    T-storms

  • Memorial Day

    Memorial Day: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 82.

    High: 82 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of showers between 11pm and 1am, then a chance of showers and thunderstorms after 1am. Cloudy, with a low around 46. East wind 7 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 65. Breezy, with a southeast wind 11 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
A chance of showers and thunderstorms. Cloudy, then gradually becoming partly cloudy, with a low around 48. South southeast wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Partly sunny, with a high near 71. Calm wind becoming northwest around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 48. Light and variable wind.
Sunday
Sunny, with a high near 79.
Sunday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 54. Chance of precipitation is 20%.
Memorial Day
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 57.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
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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:
5:56 pm CDT May 21, 2026
Forecast Valid:
6pm CDT May 21, 2026-6pm CDT May 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation