National Weather Service Forecast for: Le Mars IA
Issued by: National Weather Service Sioux Falls, SD
Updated: 11:28 am CDT May 4, 2026
 
This
Afternoon
This Afternoon: A chance of sprinkles after 5pm.  Mostly sunny, with a high near 73. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Chance
Sprinkles and
Breezy
Tonight

Tonight: A chance of sprinkles between 8pm and 9pm.  Cloudy, then gradually becoming partly cloudy, with a low around 39. Breezy, with a north northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Breezy then
Mostly Cloudy
Tuesday

Tuesday: Partly sunny, with a high near 57. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Partly Sunny

Tuesday
Night
Tuesday Night: Widespread frost after 5am.  Otherwise, mostly cloudy, with a low around 33. North wind 5 to 10 mph.
Mostly Cloudy
then Frost
Wednesday

Wednesday: Widespread frost before 8am.  Otherwise, partly sunny, with a high near 56. Light and variable wind becoming northwest 5 to 10 mph in the morning.
Frost then
Partly Sunny
Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 36. Northwest wind 5 to 10 mph becoming light and variable  in the evening.
Partly Cloudy

Thursday

Thursday: Mostly sunny, with a high near 67.
Mostly Sunny

Thursday
Night
Thursday Night: Partly cloudy, with a low around 38.
Partly Cloudy

Friday

Friday: Mostly sunny, with a high near 67.
Mostly Sunny

Hi 73 °F Lo 39 °F Hi 57 °F Lo 33 °F Hi 56 °F Lo 36 °F Hi 67 °F Lo 38 °F Hi 67 °F

Hazardous Weather Outlook
 

This Afternoon
 
A chance of sprinkles after 5pm. Mostly sunny, with a high near 73. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
 
A chance of sprinkles between 8pm and 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 39. Breezy, with a north northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Tuesday
 
Partly sunny, with a high near 57. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
 
Widespread frost after 5am. Otherwise, mostly cloudy, with a low around 33. North wind 5 to 10 mph.
Wednesday
 
Widespread frost before 8am. Otherwise, partly sunny, with a high near 56. Light and variable wind becoming northwest 5 to 10 mph in the morning.
Wednesday Night
 
Partly cloudy, with a low around 36. Northwest wind 5 to 10 mph becoming light and variable in the evening.
Thursday
 
Mostly sunny, with a high near 67.
Thursday Night
 
Partly cloudy, with a low around 38.
Friday
 
Mostly sunny, with a high near 67.
Friday Night
 
Partly cloudy, with a low around 41.
Saturday
 
Mostly sunny, with a high near 72.
Saturday Night
 
A 30 percent chance of showers. Mostly cloudy, with a low around 45.
Sunday
 
Mostly sunny, with a high near 72.

 

Forecast from NOAA-NWS for Le Mars IA.