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

Hot Weather in the West; Heavy Rainfall and Flooding in the Southwest

Hot to extremely hot temperatures are in place much of this week across parts of California and the interior Northwest U.S, with the Pacific Northwest carrying the potential for record-breaking high temperatures. Monsoonal moisture over the Southwest U.S. may lead to heavy rainfall and instances of flash flooding through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

A Few Clouds

77°F

25°C

Humidity 51%
Wind Speed SW 3 mph
Barometer 30.07 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 2 Sep 4:15 pm CDT
Extended Forecast for

Mapleton IA

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 56. Southwest wind around 6 mph becoming calm in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Mostly Clear
    then Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 1pm, then a slight chance of showers between 1pm and 4pm. Areas of smoke after 11am. Mostly cloudy, with a high near 67. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 67 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Areas of smoke before 2am. Partly cloudy, with a low around 41. North northwest wind around 6 mph becoming calm in the evening.

    Low: 41 °F

    Areas Smoke

  • Thursday

    Thursday: Sunny, with a high near 71. Light west wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly clear, with a low around 45. South southwest wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 45 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 63. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 63 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40. Northwest wind around 5 mph becoming calm in the evening.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 68. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly after 4am. Partly cloudy, with a low around 56. Southwest wind around 6 mph becoming calm in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and thunderstorms likely before 1pm, then a slight chance of showers between 1pm and 4pm. Areas of smoke after 11am. Mostly cloudy, with a high near 67. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Areas of smoke before 2am. Partly cloudy, with a low around 41. North northwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 71. Light west wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly clear, with a low around 45. South southwest wind 6 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Friday
Sunny, with a high near 63. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 40. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 68. Calm wind becoming west northwest around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 44. Calm wind.
Sunday
Sunny, with a high near 72. Calm wind becoming south southeast 5 to 7 mph in the morning.
Sunday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 53. South southeast wind around 6 mph.
Monday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 71. South wind 6 to 10 mph, with gusts as high as 17 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 54. South southeast wind around 6 mph.
Tuesday
Mostly sunny, with a high near 75. South southwest wind 5 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mapleton IA
 42.18°N 95.79°W (Elev. 1135 ft)
Last Update:
4:19 pm CDT Sep 2, 2025
Forecast Valid:
4pm CDT Sep 2, 2025-6pm CDT Sep 9, 2025
 
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