FROST FREE PERIOD SUMMARY        
STATION: OKOTOKS, ALBERTA  
Note: Frost Free Period is defined by Environment Canada as the last/first day where the temperature did not fall below zero. Temperature readings are taken at around 5 feet from the ground. So, even though you may see frost on the windshield, or on roof tops, its possible that the temperature was NOT below zero.
 
  Beginning Ending Number of  
Year: Month: Day: Month: Day: Days  
2018 April 25 September 12 141  
2017 May 17 September 15 122  
2016 May 16 September 12 120  
2015 May 21 August 21 93  
2014 May 13 September 8 119  
2013 May 3 September 26 147  
2012 May 21 September 10 113  
2011 May 7 September 17 134  
2010 May 24 September 17 117  
2009 June 11 September 20 102  
2008 May 14 September 1 111  
2007 May 15 September 12 121  
2006 May 14 September 17 126  
2005 May 13 September 20 131  
2004 May 25 September 18 117  
2003 May 21 September 16 119  
2002 May 25 September 19 118  
2001 May 22 September 7 109  
2000 June 2 September 8 99  
1999 June 9 September 3 87  
1998 May 7 September 25 142  
1997 May 22 September 18 120  
1996 May 26 September 5 103  
1995 May 27 September 17 114  
1994 May 9 September 20 135  
1993 May 10 September 12 126  
1992 May 23 August 21 91  
1991 May 6 September 17 135  
1990 May 18 September 29 135  
1930 May 27 September 13 110  
1929 June 14 August 24 72  
1928 June 2 August 13 73  
1927 June 5 September 1 89  
1926 June 12 September 6 87  
1925 June 2 August 27 87  
1924 June 23 August 28 67  
1923 May 7 September 20 137  
1922 May 11 October 1 144  
1921 May 29 September 8 103  
1920 May 23 September 24 125  
1919 June 13 September 26 106  
1918 May 27 September 29 126  
1917 May 31 September 4 97  
1916 May 31 September 13 106  
1915 May 16 September 10 118  
1914 June 8 September 8 93  
1913 June 16 September 14 92  
Average May 24 September 14 112