California frost dates: C
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Cabazon | May 16 | Oct 24 | 161 d | 9b |
| Calabasas | Jan 24 | Dec 15 | 325 d | 10a |
| Calexico | Jan 3 | Dec 27 | 358 d | 10a |
| Caliente | Apr 22 | Nov 13 | 205 d | 8b |
| California City | Mar 15 | Nov 17 | 247 d | 8b |
| California Hot Springs | May 11 | Oct 17 | 159 d | 7b |
| Calimesa | Jan 27 | Dec 19 | 326 d | 9b |
| Calipatria | Jan 16 | Dec 19 | 337 d | 9b |
| Calistoga | Mar 2 | Nov 23 | 266 d | 9b |
| Callahan | May 20 | Oct 5 | 138 d | 8a |
| Calpella | Mar 19 | Nov 20 | 246 d | 9a |
| Calpine | Jun 11 | Sep 10 | 91 d | 6b |
| Camarillo | Dec 31 | Dec 28 | 362 d | 10a |
| Cambria | Feb 13 | Feb 1 | 353 d | 10a |
| Camino | Mar 31 | Nov 21 | 235 d | 9a |
| Camp Meeker | Jan 29 | Dec 30 | 335 d | 9b |
| Camp Nelson | Jan 20 | Dec 13 | 327 d | 8b |
| Camp Pendleton | Jan 23 | Dec 11 | 322 d | 10b |
| Campbell | Feb 2 | Dec 6 | 307 d | 9b |
| Campo | Apr 30 | Oct 26 | 179 d | 9a |
| Campo Seco | Jan 22 | Dec 17 | 329 d | 9b |
| Camptonville | May 4 | Oct 30 | 179 d | 9a |
| Canby | Jun 1 | Sep 16 | 107 d | 7a |
| Canoga Park | Jan 24 | Dec 15 | 325 d | 10a |
| Cantil | Mar 19 | Nov 25 | 251 d | 8b |
| Cantua Creek | Feb 27 | Nov 26 | 272 d | 9b |
| Canyon | Jan 3 | Jan 1 | 363 d | 9b |
| Canyon Country | Jan 8 | Jan 1 | 358 d | 10a |
| Canyon Dam | Jan 30 | Dec 13 | 317 d | 7b |
| Capay | Feb 18 | Nov 30 | 285 d | 9a |
| Capistrano Beach | Jan 6 | Jan 2 | 361 d | 10b |
| Capitola | Jan 29 | Dec 13 | 318 d | 9b |
| Cardiff By The Sea | rare frost | 10b | ||
| Carlotta | Mar 4 | Nov 22 | 263 d | 9b |
| Carlsbad | rare frost | 10a | ||
| Carmel | Jan 1 | Dec 30 | 363 d | 10a |
| Carmel By The Sea | Jan 1 | Dec 30 | 363 d | 10a |
| Carmel Valley | Feb 20 | Dec 8 | 291 d | 9b |
| Carmichael | Jan 12 | Dec 16 | 338 d | 9b |
| Carnelian Bay | Jun 9 | Sep 25 | 108 d | 7a |
| Carpinteria | Jan 13 | Jan 6 | 358 d | 10b |
| Carson | Jan 9 | Jan 5 | 361 d | 10b |
| Caruthers | Feb 24 | Nov 22 | 271 d | 9a |
| Casmalia | Feb 4 | Dec 13 | 312 d | 10a |
| Caspar | Mar 2 | Dec 1 | 274 d | 9b |
| Cassel | May 29 | Sep 19 | 113 d | 7b |
| Castaic | Jan 8 | Jan 1 | 358 d | 10a |
| Castella | Apr 23 | Oct 27 | 187 d | 8b |
| Castro Valley | Jan 2 | Dec 25 | 357 d | 9b |
| Castroville | Feb 4 | Dec 6 | 305 d | 9b |
| Cathedral City | Jan 9 | Jan 9 | 365 d | 10a |
| Catheys Valley | Feb 26 | Nov 25 | 272 d | 9b |
| Cayucos | Jan 19 | Jan 14 | 360 d | 10a |
| Cazadero | Feb 26 | Dec 27 | 304 d | 9b |
| Cedar Glen | May 5 | Nov 2 | 181 d | 8a |
| Cedar Ridge | Apr 10 | Nov 13 | 217 d | 9a |
| Cedarpines Park | May 5 | Nov 2 | 181 d | 8b |
| Cedarville | May 15 | Oct 1 | 139 d | 6b |
| Ceres | Jan 31 | Dec 5 | 308 d | 9b |
| Cerritos | rare frost | 10a | ||
| Challenge | Apr 1 | Nov 17 | 230 d | 9a |
| Chatsworth | Jan 2 | Jan 1 | 364 d | 10a |
| Chester | May 28 | Sep 28 | 123 d | 7a |
| Chicago Park | Apr 3 | Nov 24 | 235 d | 9a |
| Chico | Mar 4 | Nov 17 | 258 d | 9a |
| Chilcoot | May 21 | Oct 1 | 133 d | 7a |
| Chinese Camp | Apr 9 | Nov 9 | 214 d | 9b |
| Chino | Jan 17 | Dec 19 | 336 d | 10a |
| Chino Hills | Jan 17 | Dec 19 | 336 d | 10a |
| Chowchilla | Feb 12 | Nov 30 | 291 d | 9a |
| Chualar | Apr 14 | Nov 2 | 202 d | 9b |
| Chula Vista | rare frost | 10b | ||
| Cima | Mar 6 | Dec 8 | 277 d | 8b |
| Citrus Heights | Jan 12 | Dec 16 | 338 d | 9b |
| City Of Industry | Jan 4 | Jan 2 | 363 d | 10b |
| Claremont | Jan 8 | Dec 28 | 354 d | 10a |
| Clarksburg | Feb 2 | Dec 2 | 303 d | 9b |
| Clayton | Mar 8 | Dec 22 | 289 d | 9b |
| Clearlake | Apr 10 | Nov 6 | 210 d | 9a |
| Clearlake Oaks | Apr 10 | Nov 6 | 210 d | 9a |
| Clearlake Park | Apr 10 | Nov 6 | 210 d | 9a |
| Clements | Feb 9 | Dec 5 | 299 d | 9b |
| Clio | Jun 11 | Sep 10 | 91 d | 7a |
| Clipper Mills | May 4 | Oct 30 | 179 d | 9a |
| Cloverdale | Feb 25 | Dec 3 | 281 d | 9b |
| Clovis | Jan 14 | Dec 14 | 334 d | 9b |
| Coachella | Dec 31 | Dec 27 | 361 d | 10a |
| Coalinga | Feb 14 | Nov 30 | 289 d | 9b |
| Coarsegold | Apr 24 | Nov 4 | 194 d | 9a |
| Cobb | Apr 10 | Nov 6 | 210 d | 9b |
| Coleville | May 12 | Oct 6 | 147 d | 6b |
| Colfax | Apr 3 | Nov 24 | 235 d | 9a |
| Coloma | Mar 31 | Nov 21 | 235 d | 9b |
| Colton | Jan 27 | Dec 19 | 326 d | 10a |
| Columbia | Apr 9 | Nov 9 | 214 d | 9a |
| Colusa | Feb 14 | Dec 1 | 290 d | 9b |
| Comptche | May 5 | Oct 9 | 157 d | 9b |
| Compton | rare frost | 10b | ||
| Concord | Jan 9 | Dec 14 | 339 d | 9b |
| Cool | Feb 25 | Dec 5 | 283 d | 9b |
| Copperopolis | Feb 20 | Dec 11 | 294 d | 9b |
| Corcoran | Feb 15 | Nov 27 | 285 d | 9a |
| Corning | Feb 25 | Dec 2 | 280 d | 9b |
| Corona | Jan 9 | Dec 30 | 355 d | 10a |
| Corona Del Mar | rare frost | 10b | ||
| Coronado | rare frost | 10b | ||
| Corte Madera | Jan 16 | Dec 18 | 336 d | 10a |
| Costa Mesa | rare frost | 10b | ||
| Cotati | Feb 28 | Nov 25 | 270 d | 9a |
| Cottonwood | Mar 3 | Nov 21 | 263 d | 9a |
| Coulterville | Apr 22 | Nov 2 | 194 d | 8b |
| Courtland | Feb 2 | Dec 2 | 303 d | 9b |
| Covelo | Apr 23 | Oct 19 | 179 d | 9a |
| Covina | Jan 8 | Dec 28 | 354 d | 10a |
| Coyote | May 3 | Nov 18 | 199 d | 9b |
| Crescent City | Mar 11 | Nov 23 | 257 d | 9b |
| Crescent Mills | May 22 | Sep 25 | 126 d | 7b |
| Cressey | Jan 6 | Dec 20 | 348 d | 9b |
| Crestline | May 5 | Nov 2 | 181 d | 8b |
| Creston | Apr 4 | Nov 5 | 215 d | 8b |
| Crockett | Jan 17 | Dec 27 | 344 d | 9b |
| Crows Landing | Feb 26 | Nov 29 | 276 d | 9b |
| Culver City | rare frost | 10b | ||
| Cupertino | Jan 6 | Dec 23 | 351 d | 9b |
| Cutler | Jan 23 | Dec 13 | 324 d | 9b |
| Cutten | Feb 22 | Dec 7 | 288 d | 9b |
| Cypress | rare frost | 10a | ||