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

Hazardous Weather Conditions

Current conditions at

Des Moines International Airport (KDSM)

Lat: 41.53°NLon: 93.65°WElev: 942ft.

Fog/Mist

70°F

21°C

Humidity 97%
Wind Speed S 5 mph
Barometer 29.99 in (1015.0 mb)
Dewpoint 69°F (21°C)
Visibility 1.00 mi
Last update 25 Jul 1:54 am CDT
Extended Forecast for

Saint Marys IA

Extreme Heat Watch July 26, 12:00pm until July 27, 10:00pm
Heat Advisory July 25, 12:00pm until July 26, 12:00pm
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory

  • Overnight

    Overnight: Patchy fog. Otherwise, cloudy, with a low around 68. South wind 3 to 5 mph.

    Low: 68 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 91. Heat index values as high as 101. South wind 3 to 5 mph.

    High: 91 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 73. South wind around 6 mph.

    Low: 73 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 95. Heat index values as high as 108. Southwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 95 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. South southwest wind 11 to 13 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog. Otherwise, cloudy, with a low around 68. South wind 3 to 5 mph.
Saturday
Patchy fog before 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 91. Heat index values as high as 101. South wind 3 to 5 mph.
Saturday Night
Partly cloudy, with a low around 73. South wind around 6 mph.
Sunday
Partly sunny, with a high near 95. Heat index values as high as 108. Southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. South southwest wind 11 to 13 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 73.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
Partly cloudy, with a low around 68.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Mostly sunny, with a high near 90.
Thursday Night
Partly cloudy, with a low around 70.
Friday
Mostly sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys IA
 41.32°N 93.72°W
Last Update:
1:56 am CDT Jul 25, 2026
Forecast Valid:
2am CDT Jul 25, 2026-6pm CDT Jul 31, 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