Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

70°F

21°C

Humidity 73%
Wind Speed NE 6 mph
Barometer 29.98 in (1014.3 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 19 Aug 9:53 am CDT
Extended Forecast for

Chapin IA

  • Today

    Today: Partly sunny, with a high near 77. Northeast wind 3 to 5 mph.

    High: 77 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 57. Calm wind.

    Low: 57 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Sunny, with a high near 81. Calm wind becoming south southwest 5 to 9 mph in the morning.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 63. South southwest wind around 7 mph.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday

    Friday: A slight chance of thunderstorms before 7am.  Sunny, with a high near 82. West southwest wind 6 to 8 mph becoming northwest in the afternoon.  Chance of precipitation is 10%.

    High: 82 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am.  Mostly clear, with a low around 61.

    Low: 61 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 77. Northeast wind 3 to 5 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 57. Calm wind.
Thursday
Sunny, with a high near 81. Calm wind becoming south southwest 5 to 9 mph in the morning.
Thursday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63. South southwest wind around 7 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A slight chance of thunderstorms before 7am. Sunny, with a high near 82. West southwest wind 6 to 8 mph becoming northwest in the afternoon. Chance of precipitation is 10%.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Mostly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
Chapin IA
 42.84°N 93.23°W
6:51 am CDT Aug 19, 2026
10am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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