At 334 PM CDT today (Tuesday, July 1, 2008)...the temperature at Joe Foss Field reached 92 degrees, which is the high so far. This was the first time this year that Sioux Falls has hit 90 degrees or above. Last year in 2007, Sioux Falls first reached 90 degrees on April 29th.
Over the period of record since 1889, the average first date on which Sioux Falls sees 90 degrees or above is May 30th, which is around a month earlier than it occurred this year. The latest in the year that Sioux Falls has hit its first 90 degree temperature was July 25, 1903. The earliest 90 degree temperature on record was April 14th, 1954.