Washington frost dates: I

City	Last frost	First frost	Season	Zone
Ilwaco	Apr 6	Oct 26	203 d	9a
Inchelium	May 2	Oct 2	153 d	6b
Index	Apr 14	Oct 29	198 d	8a
Indianola	Mar 8	Nov 23	260 d	9a
Ione	May 4	Oct 4	153 d	6a
Issaquah	Mar 30	Nov 7	222 d	8b