Illinois frost dates: F

City	Last frost	First frost	Season	Zone
Fairbury	Apr 23	Oct 15	175 d	6a
Fairfield	Apr 7	Oct 26	202 d	6b
Fairmount	Apr 19	Oct 19	183 d	6a
Fairview	Apr 22	Oct 19	180 d	5b
Fairview Heights	Apr 8	Oct 26	201 d	7a
Farina	Apr 3	Oct 24	204 d	6b
Farmer City	Apr 23	Oct 13	173 d	6a
Farmersville	Apr 12	Oct 20	191 d	6a
Farmington	Apr 16	Oct 23	190 d	5b
Fenton	Apr 26	Oct 13	170 d	5b
Ferris	Apr 13	Oct 22	192 d	6a
Fiatt	Apr 17	Oct 22	188 d	5b
Fidelity	Apr 14	Oct 19	188 d	6b
Fieldon	Apr 14	Oct 19	188 d	6b
Fillmore	Apr 15	Oct 19	187 d	6b
Findlay	Apr 10	Oct 24	197 d	6a
Fisher	Apr 21	Oct 18	180 d	6a
Fithian	Apr 20	Oct 21	184 d	6a
Flanagan	Apr 26	Oct 17	174 d	5b
Flat Rock	Apr 12	Oct 22	193 d	6b
Flora	Apr 9	Oct 24	198 d	6b
Flossmoor	Apr 23	Oct 20	180 d	6a
Foosland	Apr 21	Oct 17	179 d	6a
Forest City	Apr 17	Oct 19	185 d	6a
Forest Park	Apr 11	Oct 31	203 d	6a
Forrest	Apr 25	Oct 20	178 d	6a
Forreston	Apr 29	Oct 7	161 d	5b
Forsyth	Apr 14	Oct 24	193 d	6a
Fort Sheridan	Apr 26	Oct 21	178 d	6a
Fowler	Apr 14	Oct 23	192 d	6a
Fox Lake	Apr 24	Oct 23	182 d	5b
Fox River Grove	Apr 25	Oct 19	177 d	5b
Fox Valley	Apr 28	Oct 16	171 d	5b
Frankfort	Apr 23	Oct 20	180 d	6a
Frankfort Heights	Apr 4	Oct 28	207 d	7a
Franklin	Apr 19	Oct 17	181 d	6a
Franklin Grove	Apr 21	Oct 19	181 d	5b
Franklin Park	Apr 16	Oct 28	195 d	6a
Frederick	Apr 16	Oct 23	190 d	6a
Freeburg	Apr 12	Oct 20	191 d	7a
Freeman Spur	Apr 4	Oct 27	206 d	7a
Freeport	Apr 26	Oct 13	170 d	5a
Fulton	Apr 13	Oct 26	196 d	5b
Fults	Apr 9	Oct 26	200 d	7a