National Weather Service Forecast for: Lennox SD
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 4pm. Partly sunny, with a high near 67. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 35 mph.
Chance
Sprinkles and
Breezy
 Tonight

Tonight: A chance of sprinkles before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 37. Breezy, with a north northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 30 mph.
Breezy then
Mostly Cloudy
 Tuesday

Tuesday: Partly sunny, with a high near 55. Northwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Partly Sunny

 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 31. North wind 5 to 15 mph, with gusts as high as 20 mph.
Mostly Cloudy

 Wednesday

Wednesday: Mostly sunny, with a high near 55. North northeast wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Widespread frost after 5am. Otherwise, partly cloudy, with a low around 34. Northwest wind 5 to 10 mph becoming southwest after midnight.
Mostly Cloudy
then Frost
 Thursday

Thursday: Widespread frost before 7am. Otherwise, mostly sunny, with a high near 65.
Frost then
Mostly Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 37.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 67.
Mostly Sunny
Hi 67 °F Lo 37 °F Hi 55 °F Lo 31 °F Hi 55 °F Lo 34 °F Hi 65 °F Lo 37 °F Hi 67 °F

Hazardous Weather Outlook
 

This Afternoon
 
 A chance of sprinkles after 4pm. Partly sunny, with a high near 67. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 35 mph.
Tonight
 
 A chance of sprinkles before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 37. Breezy, with a north northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 30 mph.
Tuesday
 
 Partly sunny, with a high near 55. Northwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
 
 Mostly cloudy, with a low around 31. North wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday
 
 Mostly sunny, with a high near 55. North northeast wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
 
 Widespread frost after 5am. Otherwise, partly cloudy, with a low around 34. Northwest wind 5 to 10 mph becoming southwest after midnight.
Thursday
 
 Widespread frost before 7am. Otherwise, mostly sunny, with a high near 65.
Thursday Night
 
 Partly cloudy, with a low around 37.
Friday
 
 Mostly sunny, with a high near 67.
Friday Night
 
 Partly cloudy, with a low around 41.
Saturday
 
 Mostly sunny, with a high near 71.
Saturday Night
 
 Mostly cloudy, with a low around 43.
Sunday
 
 Mostly sunny, with a high near 70.

 

Forecast from NOAA-NWS for Lennox SD.