National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Extreme Heat Across the Southern U.S.; Severe Thunderstorms and Heavy Rain in the Northern Plains and Upper Midwest

Dangerous heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms will produce damaging winds and heavy rainfall over portions of the northern/central Plains into the mid/upper-Mississippi Valleys today. Read More >

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

Fair

75°F

24°C

Humidity 74%
Wind Speed SE 8 G 15 mph
Barometer 30.02 in
Dewpoint 66°F (19°C)
Visibility NA
Last update 30 Jul 9:35 am CDT
Extended Forecast for

Mapleton IA

  • Today

    Today: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 86. South southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    High: 86 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could produce heavy rainfall. Low around 66. South southeast wind 6 to 11 mph becoming north northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    Low: 66 °F

    Heavy Rain

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 77. Breezy, with a west wind 6 to 11 mph becoming north 13 to 18 mph in the afternoon. Winds could gust as high as 32 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. North wind 5 to 14 mph, with gusts as high as 26 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81. North wind 5 to 8 mph.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60. North northeast wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 84. Calm wind becoming south southeast around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 63. South southeast wind around 7 mph.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 85. South wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 85 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 86. South southeast wind 8 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Tonight
Showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could produce heavy rainfall. Low around 66. South southeast wind 6 to 11 mph becoming north northwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Friday
A 40 percent chance of showers and thunderstorms, mainly before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 77. Breezy, with a west wind 6 to 11 mph becoming north 13 to 18 mph in the afternoon. Winds could gust as high as 32 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Mostly clear, with a low around 60. North wind 5 to 14 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 81. North wind 5 to 8 mph.
Saturday Night
Mostly clear, with a low around 60. North northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 84. Calm wind becoming south southeast around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 63. South southeast wind around 7 mph.
Monday
Sunny, with a high near 85. South wind 7 to 11 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 65. South southeast wind 5 to 10 mph, with gusts as high as 18 mph.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. South wind 3 to 6 mph.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63. East wind 3 to 7 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. East northeast wind 3 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Mapleton IA
 42.18°N 95.79°W (Elev. 1135 ft)
Last Update:
7:35 am CDT Jul 30, 2026
Forecast Valid:
9am CDT Jul 30, 2026-6pm CDT Aug 5, 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