Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Des Moines International Airport (KDSM)

Lat: 41.53°NLon: 93.65°WElev: 942ft.

A Few Clouds

79°F

26°C

Humidity 56%
Wind Speed NW 12 mph
Barometer 30.12 in (1019.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 27 Aug 11:54 am CDT
Extended Forecast for

Saint Marys IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. North northwest wind around 8 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 61. North wind around 5 mph becoming calm  in the evening.

    Low: 61 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 87. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers after 5am.  Partly cloudy, with a low around 69. South wind 7 to 11 mph, with gusts as high as 18 mph.

    Low: 69 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers between 7am and 1pm.  Partly sunny, with a high near 90. Breezy, with a south wind 14 to 20 mph, with gusts as high as 28 mph.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 90 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 77. Breezy.

    Low: 77 °F

    Partly Cloudy
    and Breezy

  • Sunday

    Sunday: Mostly sunny, with a high near 96. Breezy.

    High: 96 °F

    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 77. Breezy.

    Low: 77 °F

    Slight Chance
    T-storms then
    Chance
    Showers and
    Breezy

  • Monday

    Monday: Mostly sunny, with a high near 94. Breezy.

    High: 94 °F

    Partly Sunny
    and Breezy
    then Mostly
    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 84. North northwest wind around 8 mph.
Tonight
Clear, with a low around 61. North wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 87. Calm wind becoming south southwest around 5 mph in the afternoon.
Friday Night
A 30 percent chance of showers after 5am. Partly cloudy, with a low around 69. South wind 7 to 11 mph, with gusts as high as 18 mph.
Saturday
A chance of showers between 7am and 1pm. Partly sunny, with a high near 90. Breezy, with a south wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Partly cloudy, with a low around 77. Breezy.
Sunday
Mostly sunny, with a high near 96. Breezy.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 77. Breezy.
Monday
Mostly sunny, with a high near 94. Breezy.
Monday Night
A 50 percent chance of showers after 1am. Partly cloudy, with a low around 73.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys IA
 41.3°N 93.75°W
12:16 pm CDT Aug 27, 2026
12pm CDT Aug 27, 2026-6pm CDT Sep 2, 2026
 
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Additional Resources

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Hourly Weather Forecast

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