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

Tonight: Clear early, then becoming mostly cloudy, with a low around 52. North wind around 5 mph becoming calm in the evening.
Mostly Cloudy

 Juneteenth

Juneteenth: A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 79. South southeast wind 5 to 10 mph becoming west 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Chance
Showers
 Friday
Night
Friday Night: Partly cloudy, with a low around 53. Northwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.
Partly Cloudy

 Saturday

Saturday: Increasing clouds, with a high near 81. East wind around 5 mph.
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, with gusts as high as 25 mph. Chance of precipitation is 60%.
Showers
Likely
 Sunday

Sunday: Showers likely and possibly a thunderstorm before 7am, then showers likely between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 71. Breezy, with an east wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Showers
Likely and
Breezy
 Sunday
Night
Sunday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 54.
Chance
Showers
 Monday

Monday: Partly sunny, with a high near 74.
Partly Sunny

 Monday
Night
Monday Night: Mostly cloudy, with a low around 56.
Mostly Cloudy
Lo 52 °F Hi 79 °F Lo 53 °F Hi 81 °F Lo 58 °F Hi 71 °F Lo 54 °F Hi 74 °F Lo 56 °F

 

Tonight
 
 Clear early, then becoming mostly cloudy, with a low around 52. North wind around 5 mph becoming calm in the evening.
Juneteenth
 
 A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 79. South southeast wind 5 to 10 mph becoming west 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Friday Night
 
 Partly cloudy, with a low around 53. Northwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.
Saturday
 
 Increasing clouds, with a high near 81. East wind around 5 mph.
Saturday Night
 
 Showers likely, with thunderstorms also possible after 4am. Cloudy, with a low around 58. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Sunday
 
 Showers likely and possibly a thunderstorm before 7am, then showers likely between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 71. Breezy, with an east wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Sunday Night
 
 A 30 percent chance of showers. Mostly cloudy, with a low around 54.
Monday
 
 Partly sunny, with a high near 74.
Monday Night
 
 Mostly cloudy, with a low around 56.
Tuesday
 
 A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 76. Chance of precipitation is 30%.
Tuesday Night
 
 Mostly clear, with a low around 54.
Wednesday
 
 Mostly sunny, with a high near 78.
Wednesday Night
 
 Mostly clear, with a low around 55.
Thursday
 
 Mostly sunny, with a high near 79.

 

Forecast from NOAA-NWS for Lennox SD.