With each passing day, daylight is getting longer. So, spring-like temperatures can't be far off. While Sioux Falls has already had its first 60 degree day, we usually have to wait until the end of the month to get a taste of spring air with 70 degree warmth.
Over the past 24 years, Sioux Falls averages its first seventy degree day of the year around March 28. Since 1990, the earliest it has happened was March 5, 2000 and the latest was last year when we didn't hit seventy until April 26.
While Sioux Falls usually hits its first 70 degree day on March 28, we have to wait until May 15 before the climate average typically hits 70.