Cold Daily High Temperatures

From the Minneapolis/St. Paul Weather Service daily temperature record (from
1891 to 1991), it can be seen that a daily high temperature less than
freezing is possible until the last day of April. The following dates and
temperatures show the progression of the lowest high temperatures of record
through April and part of May. These may be regarded as the latest dates for
which the stated temperature has been the high temperature for the day (i.e.
'The daily high has never been colder than XX later than YY').

  Mar 30  15  1969
  Apr  1  22  1896
  Apr  2  23  1920
  Apr 11  25  1940
  Apr 12  28  1950
  Apr 30  31  1909
  May  1  33  1909
  May  6  35  1931
  May 14  38  1907
  May 15  39  1907

For dates after May 15, a high of less than 40 has not been observed at 
Minneapolis/St. Paul.


An example from Greater Minnesota:

At Morris 'latest lowest high temps' are 

  Mar 30   8  1969
      31  14  1969
  Apr  2  18  1975
       6  20  1979
      13  23  1950
      16  26  1910
  May  4  30  1944
       7  32  1907
       9  38  1902
      12  39  1966

For dates after May 12, a high of less than 40 has not been observed at Morris.

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