Heat Persists in the South Central U.S. and California; Heavy Rain in the Ohio Valley

Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley, as well as in the Southwest and California this week with limited nighttime relief. Heavy rainfall will lead to localized areas of flash flooding in parts of the Ohio Valley/Central Appalachians. Dry and breezy conditions will enhance fire weather concerns across the northern Rockies and High Plains. Read More >

Current conditions at

Chariton (KCNC)

Lat: 41.03°NLon: 93.37°WElev: 1050ft.

Fair

70°F

21°C

Humidity 100%
Wind Speed S 5 mph
Barometer 30.05 in
Dewpoint 70°F (21°C)
Visibility 9.00 mi
Last update 9 Sep 11:55 pm CDT
Extended Forecast for

Williamson IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 63. Light and variable wind.

    Low: 63 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog between 8am and 9am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 80. North northeast wind 3 to 5 mph.

    High: 80 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 60. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 60 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 82. South wind 5 to 11 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am.  Mostly clear, with a low around 66. South southeast wind around 8 mph.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Mostly Clear
    then Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 81. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 61.

    Low: 61 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a high near 81.

    High: 81 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 68. Chance of precipitation is 30%.

    Low: 68 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly cloudy, with a low around 63. Light and variable wind.
Thursday
Patchy fog between 8am and 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 80. North northeast wind 3 to 5 mph.
Thursday Night
Clear, with a low around 60. Calm wind becoming south southeast around 5 mph after midnight.
Friday
Sunny, with a high near 82. South wind 5 to 11 mph.
Friday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly clear, with a low around 66. South southeast wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Monday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Breezy.
Monday Night
Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 60. Chance of precipitation is 70%.
Tuesday
A 40 percent chance of showers. Mostly cloudy, with a high near 72.
Tuesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 60.
Wednesday
A 50 percent chance of showers. Mostly cloudy, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Williamson IA
 41.08°N 93.26°W
10:47 pm CDT Sep 9, 2026
12am CDT Sep 10, 2026-6pm CDT Sep 16, 2026
 
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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