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Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

A Few Clouds

75°F

24°C

Humidity 69%
Wind Speed S 9 mph
Barometer 29.80 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 20 Jun 4:35 am CDT
Extended Forecast for

Denison IA

Extreme Heat Warning June 20, 12:00pm until June 22, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind around 15 mph, with gusts as high as 23 mph.

    Low: 69 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Sunny and hot, with a high near 98. Heat index values as high as 106. Breezy, with a south wind 15 to 18 mph, with gusts as high as 29 mph.

    High: 98 °F

    Hot and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Windy, with a south wind 17 to 21 mph, with gusts as high as 32 mph.

    Low: 77 °F

    Mostly Clear
    and Windy

  • Saturday

    Saturday: Sunny and hot, with a high near 99. Heat index values as high as 105. Windy, with a south southwest wind 18 to 22 mph, with gusts as high as 32 mph.

    High: 99 °F

    Hot and Windy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. Breezy, with a south wind around 18 mph, with gusts as high as 30 mph.

    Low: 75 °F

    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny and hot, with a high near 97. Windy.

    High: 97 °F

    Hot and Windy

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. Breezy.

    Low: 73 °F

    Chance
    T-storms and
    Breezy

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 88. Chance of precipitation is 60%.

    High: 88 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 90%.

    Low: 62 °F

    Showers

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. South wind around 15 mph, with gusts as high as 23 mph.
Friday
Sunny and hot, with a high near 98. Heat index values as high as 106. Breezy, with a south wind 15 to 18 mph, with gusts as high as 29 mph.
Friday Night
Mostly clear, with a low around 77. Windy, with a south wind 17 to 21 mph, with gusts as high as 32 mph.
Saturday
Sunny and hot, with a high near 99. Heat index values as high as 105. Windy, with a south southwest wind 18 to 22 mph, with gusts as high as 32 mph.
Saturday Night
Mostly clear, with a low around 75. Breezy, with a south wind around 18 mph, with gusts as high as 30 mph.
Sunday
Sunny and hot, with a high near 97. Windy.
Sunday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. Breezy.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 88. Chance of precipitation is 60%.
Monday Night
Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 90%.
Tuesday
Showers and possibly a thunderstorm. High near 81. Chance of precipitation is 80%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 70%.
Wednesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 86. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
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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:
3:34 am CDT Jun 20, 2025
Forecast Valid:
4am CDT Jun 20, 2025-6pm CDT Jun 26, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation