National Weather Service Forecast for: Le Mars IA
Issued by: National Weather Service Sioux Falls, SD
Updated: 7:28 pm CDT Jun 18, 2026
 
Tonight

Tonight: Mostly clear, with a low around 52. North wind around 5 mph becoming calm.
Mostly Clear

 Juneteenth

Juneteenth: A 30 percent chance of showers, mainly before 2pm. Partly sunny, with a high near 79. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Chance
Showers
 Friday
Night
Friday Night: Partly cloudy, with a low around 54. West southwest wind 5 to 10 mph becoming light and variable in the evening.
Partly Cloudy

 Saturday

Saturday: Increasing clouds, with a high near 81. Calm wind becoming east around 5 mph in the afternoon.
Increasing
Clouds
 Saturday
Night
Saturday Night: Showers likely, with thunderstorms also possible after 4am. Cloudy, with a low around 58. East wind 10 to 15 mph. Chance of precipitation is 70%.
Showers
Likely
 Sunday

Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Breezy, with an east wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Showers
Likely and
Breezy
 Sunday
Night
Sunday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 54.
Chance
Showers
 Monday

Monday: Partly sunny, with a high near 75.
Partly Sunny

 Monday
Night
Monday Night: Partly cloudy, with a low around 55.
Partly Cloudy
Lo 52 °F Hi 79 °F Lo 54 °F Hi 81 °F Lo 58 °F Hi 72 °F Lo 54 °F Hi 75 °F Lo 55 °F

 

Tonight
 
 Mostly clear, with a low around 52. North wind around 5 mph becoming calm.
Juneteenth
 
 A 30 percent chance of showers, mainly before 2pm. Partly sunny, with a high near 79. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Friday Night
 
 Partly cloudy, with a low around 54. West southwest wind 5 to 10 mph becoming light and variable in the evening.
Saturday
 
 Increasing clouds, with a high near 81. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
 
 Showers likely, with thunderstorms also possible after 4am. Cloudy, with a low around 58. East wind 10 to 15 mph. Chance of precipitation is 70%.
Sunday
 
 Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Breezy, with an east wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Sunday Night
 
 A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 54.
Monday
 
 Partly sunny, with a high near 75.
Monday Night
 
 Partly cloudy, with a low around 55.
Tuesday
 
 A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 77.
Tuesday Night
 
 Partly cloudy, with a low around 55.
Wednesday
 
 Mostly sunny, with a high near 80.
Wednesday Night
 
 Mostly clear, with a low around 55.
Thursday
 
 Mostly sunny, with a high near 79.

 

Forecast from NOAA-NWS for Le Mars IA.