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

Extreme Heat and Excessive Rainfall Today

Dangerous and extreme heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest U.S. will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Multiple rounds of thunderstorms will produce heavy to excessive rainfall with significant flash flooding across portions of southern New England. Read More >

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

Fair

88°F

31°C

Humidity 59%
Wind Speed SE 9 mph
Barometer 29.96 in
Dewpoint 72°F (22°C)
Visibility NA
Heat Index95°F (35°C)
Last update 29 Jul 5:55 pm CDT
Extended Forecast for

Mapleton IA

  • Tonight

    Tonight: Isolated showers and thunderstorms between 7pm and 8pm. Partly cloudy, with a low around 68. Southeast wind 5 to 8 mph. Chance of precipitation is 20%.

    Low: 68 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms before 11am, then a chance of showers between 11am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. South southeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Low around 65. South southeast wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 65 °F

    Showers

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 78. West wind 7 to 17 mph becoming north in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 59. North wind 5 to 14 mph, with gusts as high as 26 mph.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81. North wind 5 to 8 mph, with gusts as high as 16 mph.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 59. North northeast wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 83. Calm wind becoming south southeast around 6 mph in the afternoon.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 62. South southeast wind around 7 mph.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Isolated showers and thunderstorms between 7pm and 8pm. Partly cloudy, with a low around 68. Southeast wind 5 to 8 mph. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms before 11am, then a chance of showers between 11am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. South southeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm between 1am and 4am, then a chance of showers and thunderstorms after 4am. Low around 65. South southeast wind 6 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 78. West wind 7 to 17 mph becoming north in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Mostly clear, with a low around 59. 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, with gusts as high as 16 mph.
Saturday Night
Clear, with a low around 59. North northeast wind around 5 mph becoming calm in the evening.
Sunday
Sunny, with a high near 83. Calm wind becoming south southeast around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 62. South southeast wind around 7 mph.
Monday
Sunny, with a high near 84. South wind 9 to 15 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 65. South southeast wind 7 to 14 mph, with gusts as high as 22 mph.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. South wind 3 to 6 mph.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 62. Northeast wind 3 to 7 mph.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 80. East northeast wind 5 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:
5:21 pm CDT Jul 29, 2026
Forecast Valid:
6pm CDT Jul 29, 2026-6pm CDT Aug 5, 2026
 
Forecast Discussion
 
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Additional Resources

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