California frost dates: A
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Acampo | Feb 9 | Dec 5 | 299 d | 9b |
| Acton | Mar 10 | Nov 19 | 254 d | 9a |
| Adelanto | Mar 18 | Nov 11 | 238 d | 8b |
| Adin | May 28 | Sep 29 | 124 d | 7a |
| Agoura Hills | Jan 24 | Dec 15 | 325 d | 10a |
| Aguanga | Apr 29 | Nov 18 | 203 d | 9b |
| Ahwahnee | May 24 | Oct 10 | 139 d | 9a |
| Alameda | Jan 7 | Dec 23 | 350 d | 10a |
| Alamo | Mar 8 | Dec 22 | 289 d | 9b |
| Albany | Jan 3 | Jan 1 | 363 d | 10a |
| Albion | Mar 2 | Dec 1 | 274 d | 9b |
| Alderpoint | Mar 10 | Dec 1 | 266 d | 9a |
| Alhambra | Jan 4 | Jan 2 | 363 d | 10a |
| Aliso Viejo | Jan 6 | Jan 2 | 361 d | 10b |
| Alleghany | Apr 28 | Oct 25 | 180 d | 8b |
| Alpaugh | Jan 31 | Dec 8 | 311 d | 9a |
| Alpine | Feb 12 | Dec 24 | 315 d | 9b |
| Alta | May 4 | Nov 4 | 184 d | 8b |
| Altadena | Jan 8 | Jan 7 | 364 d | 10b |
| Altaville | Feb 20 | Dec 11 | 294 d | 9a |
| Alturas | Jun 3 | Sep 13 | 102 d | 6b |
| Alviso | Jan 6 | Dec 23 | 351 d | 10a |
| Amador City | Mar 4 | Dec 11 | 282 d | 9b |
| Amboy | Mar 6 | Dec 8 | 277 d | 9b |
| American Canyon | Mar 5 | Nov 21 | 261 d | 9b |
| Anaheim | rare frost | 10b | ||
| Anderson | Mar 3 | Nov 21 | 263 d | 9a |
| Angels Camp | Feb 20 | Dec 11 | 294 d | 9a |
| Angelus Oaks | May 27 | Oct 4 | 130 d | 7a |
| Angwin | Apr 7 | Dec 5 | 242 d | 9b |
| Annapolis | Feb 26 | Dec 27 | 304 d | 9b |
| Antelope | Jan 12 | Dec 16 | 338 d | 9b |
| Antioch | Jan 12 | Dec 19 | 341 d | 9b |
| Anza | May 16 | Oct 24 | 161 d | 8b |
| Apple Valley | Mar 18 | Nov 11 | 238 d | 8b |
| Applegate | Apr 3 | Nov 24 | 235 d | 9a |
| Aptos | Jan 29 | Dec 13 | 318 d | 9b |
| Arbuckle | Feb 14 | Dec 1 | 290 d | 9b |
| Arcadia | Jan 4 | Jan 2 | 363 d | 10a |
| Arcata | Feb 22 | Dec 7 | 288 d | 9b |
| Armona | Feb 7 | Dec 1 | 297 d | 9a |
| Arnold | May 7 | Oct 28 | 174 d | 6b |
| Aromas | Jan 28 | Dec 13 | 319 d | 9b |
| Arroyo Grande | Feb 1 | Jan 4 | 337 d | 10a |
| Artesia | rare frost | 10a | ||
| Artois | Feb 25 | Dec 2 | 280 d | 9b |
| Arvin | Jan 31 | Dec 8 | 311 d | 9b |
| Atascadero | Jan 19 | Jan 14 | 360 d | 9a |
| Atherton | Jan 17 | Dec 12 | 329 d | 9b |
| Atwater | Mar 3 | Nov 24 | 266 d | 9a |
| Atwood | rare frost | 10b | ||
| Auberry | Mar 25 | Dec 3 | 253 d | 9a |
| Auburn | Feb 25 | Dec 5 | 283 d | 9b |
| Avalon | rare frost | 10b | ||
| Avenal | Feb 19 | Nov 29 | 283 d | 9b |
| Avery | May 7 | Oct 28 | 174 d | 8b |
| Avila Beach | Feb 1 | Jan 4 | 337 d | 10a |
| Azusa | Jan 8 | Dec 28 | 354 d | 9b |