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
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	26	September	14	111