Tulsa Oklahoma Climatological Records    
    Frost/Freeze    
    Record and Mean Dates of Last Occurrence in Spring and First Occurrence in Fall    
    For the Period January 1906 through May 2009    
       
       
    Mean Mean  Mean     
    Last Occurrence First Occurrence Days between    
    Temperature (F) Spring Fall Occurrence    
       
    32° Frost/Light Freeze Mar 29   Nov 03   218    
    28° Hard Freeze Mar 18 Nov 13 240    
    24° Killing Freeze Mar 08   Nov 26   263    
       
       
       
    Record Last Occurrence  Record First Occurrence     
    in Spring in Fall    
    Temperature (F) Earliest Latest Earliest Latest    
       
    32° Frost/Light Freeze 6 Mar 1985 2 May 1909   8 Oct 1952 28 Nov 1990    
    28° Hard Freeze 14 Feb 1981 17 Apr 1921 9 Oct 2000 16 Dec 1981    
    24° Killing Freeze 14 Jan 1999 13 Apr 1957   24 Oct 1917 28 Dec 1971    
       
       
       
    Record Number of Days Between First and Last Occurrence    
       
    Fewest Number Greatest Number    
    Temperature (F) Spring of Days Fall Spring of Days Fall    
             
    32° Frost/Light Freeze 2 May 1909 163 13 Oct 1909 6 Mar 1985 257 19 Nov 1985    
    28° Hard Freeze 13 Apr 1957 195 26 Oct 1957 14 Feb 1981 304 16 Dec 1981    
    24° Killing Freeze 27 Mar 1913 215 29 Oct 1913 14 Jan 1999 339 20 Dec 1999    
       
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    Date Modified: May 19, 2009