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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

Fog/Mist

63°F

17°C

Humidity 100%
Wind Speed NE 12 G 18 mph
Barometer 30.04 in
Dewpoint 63°F (17°C)
Visibility 3.00 mi
Last update 20 Sep 2:15 pm CDT
Extended Forecast for

Charter Oak IA

  • This Afternoon

    This Afternoon: A slight chance of drizzle between 3pm and 4pm, then a chance of showers after 4pm. Patchy fog after 3pm. Otherwise, cloudy, with a high near 63. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: Showers, with thunderstorms also possible after 4am. Patchy fog before 9pm, then patchy fog after 11pm. Low around 53. East northeast wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Showers and
    Patchy Fog

  • Monday

    Monday: Showers and possibly a thunderstorm. Patchy fog before 2pm. High near 58. East northeast wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 58 °F

    Showers and
    Patchy Fog

  • Monday Night

    Monday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 49. East northeast wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Showers
    Likely then
    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 60. East northeast wind around 6 mph.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Showers likely, mainly before 1pm. Cloudy, with a high near 64. Chance of precipitation is 60%.

    High: 64 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
A slight chance of drizzle between 3pm and 4pm, then a chance of showers after 4pm. Patchy fog after 3pm. Otherwise, cloudy, with a high near 63. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers, with thunderstorms also possible after 4am. Patchy fog before 9pm, then patchy fog after 11pm. Low around 53. East northeast wind 6 to 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Showers and possibly a thunderstorm. Patchy fog before 2pm. High near 58. East northeast wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 49. East northeast wind 5 to 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Partly sunny, with a high near 60. East northeast wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 46.
Wednesday
Mostly sunny, with a high near 64.
Wednesday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 49.
Thursday
Showers likely, mainly before 1pm. Cloudy, with a high near 64. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 54.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 67.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 56.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Charter Oak IA
 42.07°N 95.59°W
Last Update:
1:26 pm CDT Sep 20, 2026
Forecast Valid:
2pm CDT Sep 20, 2026-6pm CDT Sep 26, 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