Colorado frost dates: J

City	Last frost	First frost	Season	Zone
Jamestown	Jun 21	Sep 2	73 d	5b
Jaroso	May 31	Sep 23	115 d	5a
Jefferson	Jun 15	Sep 9	86 d	5a
Joes	May 3	Oct 9	159 d	5b
Johnstown	May 10	Oct 1	144 d	5b
Julesburg	May 7	Oct 6	152 d	5b