California planting zones & frost dates

The 115 California cities on this site fall in zones 8b, 9a, 9b, 10a, 10b, 11a. Last spring frost dates range from Jan 3 in San Mateo to Apr 11 in Lancaster.

City	Zone	Last frost	First frost	Population
Los Angeles	10a	Rare	Rare	3,878,704
San Diego	10b	Rare	Rare	1,404,452
San Jose	9b	Jan 10	Dec 14	997,368
San Francisco	10b	Rare	Rare	827,526
Fresno	9b	Jan 29	Dec 6	550,105
Sacramento	9b	Jan 22	Dec 7	535,798
Long Beach	10b	Rare	Rare	450,901
Oakland	10a	Rare	Rare	443,554
Bakersfield	9b	Feb 12	Dec 1	417,468
Anaheim	10b	Rare	Rare	344,561
Stockton	9b	Feb 19	Nov 28	324,975
Riverside	10a	Jan 25	Dec 15	323,757
Irvine	10b	Jan 14	Dec 13	318,683
Santa Ana	10b	Rare	Rare	316,184
Chula Vista	10b	Jan 17	Dec 22	278,546
Santa Clarita	10a	Jan 26	Dec 20	229,159
Fremont	9b	Jan 8	Dec 19	228,192
San Bernardino	10a	Feb 10	Dec 11	224,775
Modesto	9b	Feb 10	Nov 29	220,592
Fontana	10a	Jan 13	Dec 22	218,455
Moreno Valley	9b	Feb 10	Dec 11	213,919
Oxnard	10b	Rare	Rare	200,616
Huntington Beach	10b	Rare	Rare	193,151
Glendale	10a	Jan 14	Jan 1	187,823
Ontario	10a	Jan 13	Dec 22	185,285
Elk Grove	9b	Feb 17	Nov 26	182,797
Santa Rosa	9a	Mar 7	Nov 21	177,524
Rancho Cucamonga	10a	Jan 13	Dec 22	176,675
Garden Grove	10b	Rare	Rare	172,361
Oceanside	10a	Feb 4	Dec 1	170,941
Lancaster	8b	Apr 11	Oct 27	167,426
Roseville	9b	Mar 5	Nov 17	163,304
Palmdale	9a	Mar 27	Nov 12	162,536
Corona	10a	Jan 29	Dec 19	161,540
Salinas	9b	Feb 12	Dec 2	160,783
Hayward	10a	Jan 12	Dec 17	158,440
Sunnyvale	9b	Jan 18	Dec 15	156,792
Escondido	10a	Jan 14	Dec 23	148,847
Pomona	10a	Jan 26	Dec 19	147,966
Visalia	9b	Feb 2	Dec 6	146,271
Victorville	8b	Mar 31	Nov 5	140,721
Fullerton	10a	Rare	Rare	140,054
Torrance	10b	Jan 27	Dec 16	139,576
Orange	10b	Rare	Rare	137,941
Pasadena	10a	Jan 14	Jan 1	137,195
Santa Clara	9b	Jan 26	Dec 12	133,132
Clovis	9b	Jan 29	Dec 6	127,993
Simi Valley	10a	Feb 12	Dec 6	125,778
Thousand Oaks	10a	Feb 12	Dec 6	124,229
Concord	9b	Jan 23	Dec 6	124,016
Vallejo	9b	Mar 25	Nov 12	123,475
Fairfield	9b	Jan 28	Dec 7	122,646
Berkeley	10a	Jan 12	Dec 25	121,749
Antioch	9b	Jan 22	Dec 10	118,453
Menifee	9b	Feb 10	Dec 10	117,041
Richmond	10a	Jan 14	Dec 27	115,353
Carlsbad	10a	Rare	Rare	113,575
Murrieta	10a	Feb 14	Jan 3	112,539
Temecula	9b	Feb 14	Jan 3	112,431
Santa Maria	9b	Feb 18	Dec 5	111,346
Ventura	10a	Rare	Rare	109,831
Downey	10b	Rare	Rare	109,368
Costa Mesa	10b	Rare	Rare	109,131
Jurupa Valley	10a	Jan 29	Dec 19	108,154
West Covina	10a	Jan 13	Dec 28	106,920
Rialto	10a	Feb 10	Dec 11	104,918
El Monte	10b	Jan 13	Dec 28	104,639
Vacaville	9b	Mar 3	Nov 21	103,994
Burbank	10a	Jan 10	Dec 16	103,533
El Cajon	10a	Jan 21	Dec 12	103,291
San Mateo	10a	Jan 3	Dec 21	103,006
Chico	9b	Mar 15	Nov 10	102,911
Inglewood	10b	Rare	Rare	102,774
Hesperia	8b	Mar 12	Nov 23	101,836
Daly City	10a	Jan 23	Dec 12	101,418
Tracy	9b	Mar 9	Nov 20	100,136
Vista	10a	Feb 24	Dec 24	99,322
Norwalk	10b	Rare	Rare	98,230
San Marcos	10a	Jan 14	Dec 23	96,620
Merced	9a	Mar 19	Nov 16	96,073
Manteca	9b	Feb 17	Nov 24	94,292
Indio	10a	Jan 5	Dec 17	94,275
Chino	10a	Feb 3	Dec 10	94,010
Redding	9b	Mar 17	Nov 16	93,502
Hemet	9b	Feb 14	Dec 2	92,912
Mission Viejo	10b	Rare	Rare	91,601
Carson	10b	Rare	Rare	91,358
Compton	10b	Rare	Rare	91,129
South Gate	10b	Rare	Rare	90,805
Santa Monica	11a	Rare	Rare	90,729
Westminster	10a	Rare	Rare	89,537
Folsom	9b	Jan 22	Dec 7	88,091
Mountain View	10a	Jan 18	Dec 15	87,316
Santa Barbara	10b	Jan 27	Dec 29	87,291
Lake Forest	10b	Rare	Rare	87,159
Citrus Heights	9b	Jan 22	Dec 7	86,909
San Leandro	10a	Jan 22	Dec 10	86,571
San Ramon	9b	Feb 28	Nov 25	85,924
Whittier	10b	Rare	Rare	85,589
Livermore	9b	Feb 28	Nov 25	84,867
Rancho Cordova	9b	Jan 22	Dec 7	84,113
Hawthorne	10b	Rare	Rare	83,633
Perris	9b	Feb 10	Dec 10	83,032
Redwood City	10a	Jan 31	Dec 4	82,982
Newport Beach	10b	Rare	Rare	82,970
Buena Park	10a	Rare	Rare	82,611
Alhambra	10a	Jan 13	Dec 28	80,279
Milpitas	10a	Jan 26	Dec 12	79,746
Upland	10a	Jan 26	Dec 19	79,684
Tustin	10a	Rare	Rare	78,863
Alameda	10a	Jan 22	Dec 10	78,795
Lakewood	10a	Rare	Rare	78,494
Chino Hills	10a	Feb 3	Dec 10	77,418
Pittsburg	9b	Jan 22	Dec 10	77,131
Napa	9b	Feb 27	Nov 28	76,921

Frost dates are 30%-risk dates from the nearest suitable NOAA station. Population: Census Vintage 2024 estimates.