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

Des Moines International Airport (KDSM)

Lat: 41.53°NLon: 93.65°WElev: 942ft.

Overcast

42°F

6°C

Humidity 82%
Wind Speed SE 3 mph
Barometer 30.17 in (1022.4 mb)
Dewpoint 37°F (3°C)
Visibility 7.00 mi
Last update 3 Mar 9:54 pm CST
Extended Forecast for

Saint Marys IA

  • Tonight

    Tonight: A slight chance of drizzle after 2am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 37. Northeast wind around 6 mph.

    Low: 37 °F

    Mostly Cloudy
    then Slight
    Chance
    Drizzle and
    Patchy Fog

  • Wednesday

    Wednesday: A slight chance of drizzle before noon, then a chance of drizzle after 1pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 50. Northeast wind 3 to 6 mph.

    High: 50 °F

    Chance
    Drizzle and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Areas of dense fog after 11pm. Otherwise, mostly cloudy, with a low around 40. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Chance
    Showers and
    Areas Dense
    Fog

  • Thursday

    Thursday: Areas of fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 63. Calm wind becoming south southeast 5 to 8 mph in the afternoon.

    High: 63 °F

    Areas Fog
    then Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers, then showers and possibly a thunderstorm after midnight. Low around 49. South southeast wind 8 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Slight Chance
    Showers then
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm before 9am, then showers between 9am and noon, then showers likely and possibly a thunderstorm after noon. High near 71. Breezy. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 71 °F

    Breezy.
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 38. Breezy. Chance of precipitation is 70%.

    Low: 38 °F

    Rain Likely
    and Breezy
    then Chance
    Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of drizzle after 2am. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 37. Northeast wind around 6 mph.
Wednesday
A slight chance of drizzle before noon, then a chance of drizzle after 1pm. Patchy fog before 9am. Otherwise, cloudy, with a high near 50. Northeast wind 3 to 6 mph.
Wednesday Night
A 50 percent chance of showers. Areas of dense fog after 11pm. Otherwise, mostly cloudy, with a low around 40. Light and variable wind. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Areas of fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 63. Calm wind becoming south southeast 5 to 8 mph in the afternoon.
Thursday Night
A slight chance of showers, then showers and possibly a thunderstorm after midnight. Low around 49. South southeast wind 8 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers and possibly a thunderstorm before 9am, then showers between 9am and noon, then showers likely and possibly a thunderstorm after noon. High near 71. Breezy. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 38. Breezy. Chance of precipitation is 70%.
Saturday
Mostly sunny, with a high near 54.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 64. Breezy.
Sunday Night
Mostly clear, with a low around 42.
Monday
Sunny, with a high near 70. Breezy.
Monday Night
Mostly clear, with a low around 50.
Tuesday
A 40 percent chance of rain. Mostly sunny, with a high near 67. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys IA
 41.3°N 93.75°W
Last Update:
5:26 pm CST Mar 3, 2026
Forecast Valid:
10pm CST Mar 3, 2026-6pm CDT Mar 10, 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