Cool June Start Not All That Unusual

Over the weekend, record low maximum temperatures were set or tied on each of Saturday and Sunday at Joe Foss Field.  But how unusual is this, beyond setting the marks for the individual days?

The benchmark for consecutive days with highs below 60 degrees during June was set in 1945, when from June 2 - June 7, the temperature failed to climb to 60 degrees for six straight days. During this stretch, the average high temperature was only 55.2 degrees.  This month, the high only failed to reach 60 on two consective days, placing this year in a sizable tie for the third longest cool stretch.

 

Consecutive Days With Highs Less Than 60 Degrees

1945 (2nd-7th)

6

1962 (1st-3rd), 1951 (1st-3rd)

3

2009 (6th-7th), 1998 (3rd-4th), 1993 (1st-2nd), 1941 (12th-13th), 1924 (7th-8th), 1915 (16th-17th), 1908 (1st-2nd), 1897 (1st-2nd) 

2

If this temperature is expanded to include highs of 65 degrees or less (currently the high for Monday has been 65 degrees), and if one assumed highs the next two days less than 65 degrees as currently forecast, then this would be the second longest streak with highs of 65 degrees or less (5 days) after the 7-day stretch which started June 1945, and the seven day period of June 3 to June 9, 1998.

As of today at Joe Foss Field (FSD), for the first week of June, the average temperature has been 57.6 degrees, which is 6.6 degrees below normal.



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