California frost dates: S
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Sacramento | Jan 12 | Dec 16 | 338 d | 9b |
| Saint Helena | Feb 3 | Dec 4 | 304 d | 9b |
| Salida | Jan 31 | Dec 5 | 308 d | 9b |
| Salinas | Feb 4 | Dec 6 | 305 d | 9b |
| Salton City | Jan 7 | Jan 4 | 362 d | 10a |
| Salyer | Apr 16 | Oct 31 | 198 d | 9a |
| Samoa | Feb 22 | Dec 7 | 288 d | 9b |
| San Andreas | Jan 22 | Dec 17 | 329 d | 9a |
| San Anselmo | Jan 16 | Dec 18 | 336 d | 9b |
| San Ardo | May 8 | Oct 22 | 167 d | 9a |
| San Bernardino | Jan 27 | Dec 19 | 326 d | 10a |
| San Bruno | Jan 11 | Jan 10 | 364 d | 10a |
| San Carlos | Jan 17 | Dec 12 | 329 d | 10a |
| San Clemente | Jan 6 | Jan 2 | 361 d | 10b |
| San Diego | rare frost | 10b | ||
| San Dimas | Jan 8 | Dec 28 | 354 d | 10a |
| San Fernando | Jan 2 | Jan 1 | 364 d | 10a |
| San Francisco | rare frost | 10b | ||
| San Gabriel | Jan 4 | Jan 2 | 363 d | 10a |
| San Geronimo | Jan 11 | Dec 21 | 344 d | 9b |
| San Gregorio | Mar 2 | Nov 25 | 268 d | 9b |
| San Jacinto | Jan 31 | Dec 10 | 313 d | 9b |
| San Joaquin | Feb 27 | Nov 26 | 272 d | 9a |
| San Jose | Jan 2 | Dec 25 | 357 d | 9b |
| San Juan Bautista | Feb 19 | Dec 1 | 285 d | 9b |
| San Juan Capistrano | Jan 6 | Jan 2 | 361 d | 10b |
| San Leandro | Jan 2 | Dec 25 | 357 d | 10a |
| San Lorenzo | Jan 2 | Dec 25 | 357 d | 10a |
| San Lucas | Feb 23 | Nov 22 | 272 d | 9a |
| San Luis Obispo | Jan 16 | Dec 25 | 343 d | 9b |
| San Luis Rey | Jan 23 | Dec 11 | 322 d | 9b |
| San Marcos | Jan 2 | Dec 30 | 362 d | 10a |
| San Marino | Jan 4 | Jan 2 | 363 d | 10a |
| San Martin | Feb 24 | Nov 27 | 276 d | 9b |
| San Mateo | Dec 29 | Dec 26 | 362 d | 10a |
| San Miguel | Apr 4 | Nov 5 | 215 d | 8b |
| San Pablo | Jan 4 | Jan 2 | 363 d | 10a |
| San Pedro | Jan 9 | Jan 5 | 361 d | 10b |
| San Quentin | Jan 16 | Dec 18 | 336 d | 10a |
| San Rafael | Jan 11 | Dec 21 | 344 d | 9b |
| San Ramon | Feb 15 | Dec 2 | 290 d | 9b |
| San Simeon | Feb 13 | Feb 1 | 353 d | 10a |
| San Ysidro | Jan 10 | Jan 1 | 356 d | 10b |
| San Ysidro (San Diego) | Jan 6 | Dec 31 | 359 d | 10b |
| Sanger | Jan 30 | Dec 11 | 315 d | 9b |
| Santa Ana | rare frost | 10b | ||
| Santa Barbara | Jan 13 | Jan 6 | 358 d | 10b |
| Santa Clara | Jan 12 | Dec 22 | 344 d | 9b |
| Santa Clarita | Jan 8 | Jan 1 | 358 d | 10a |
| Santa Cruz | Jan 29 | Dec 13 | 318 d | 10a |
| Santa Fe Springs | rare frost | 10b | ||
| Santa Margarita | Jan 16 | Dec 25 | 343 d | 8b |
| Santa Maria | Feb 4 | Dec 13 | 312 d | 9b |
| Santa Monica | rare frost | 11a | ||
| Santa Paula | Dec 31 | Dec 28 | 362 d | 10a |
| Santa Rita Park | Feb 26 | Nov 25 | 272 d | 9a |
| Santa Rosa | Feb 25 | Dec 1 | 279 d | 9a |
| Santa Ynez | Apr 11 | Nov 8 | 211 d | 9b |
| Santa Ysabel | Apr 18 | Oct 26 | 191 d | 9a |
| Santee | Jan 6 | Dec 21 | 349 d | 10a |
| Saratoga | Feb 2 | Dec 6 | 307 d | 9b |
| Sausalito | rare frost | 10a | ||
| Scotia | Feb 1 | Dec 19 | 321 d | 9b |
| Scott Bar | Apr 30 | Oct 18 | 171 d | 8a |
| Scotts Valley | Mar 25 | Nov 11 | 231 d | 9b |
| Seal Beach | rare frost | 10a | ||
| Seaside | Jan 2 | Dec 23 | 355 d | 10a |
| Sebastopol | Mar 20 | Nov 13 | 238 d | 9a |
| Seeley | Jan 6 | Dec 21 | 349 d | 10a |
| Seiad Valley | May 4 | Oct 13 | 162 d | 8b |
| Selma | Jan 30 | Dec 11 | 315 d | 9b |
| Sequoia National Park | Jun 8 | Sep 20 | 104 d | 6b |
| Shafter | Jan 31 | Dec 5 | 308 d | 9a |
| Shandon | Apr 4 | Nov 5 | 215 d | 8b |
| Shasta | Feb 13 | Dec 13 | 303 d | 9a |
| Shasta Lake | Feb 8 | Dec 28 | 323 d | 9b |
| Shaver Lake | Jun 1 | Oct 6 | 127 d | 8a |
| Sheridan | Feb 11 | Nov 30 | 292 d | 9b |
| Sherman Oaks | Dec 31 | Dec 30 | 364 d | 10a |
| Shingle Springs | Mar 31 | Nov 21 | 235 d | 9b |
| Shingletown | Jun 9 | Sep 21 | 104 d | 9b |
| Shoshone | Mar 29 | Nov 3 | 219 d | 8b |
| Sierra City | May 12 | Oct 29 | 170 d | 7a |
| Sierra Madre | Apr 28 | Nov 15 | 201 d | 10a |
| Sierraville | frost any month | 6b | ||
| Signal Hill | rare frost | 10b | ||
| Silverado | rare frost | 10b | ||
| Simi Valley | Jan 24 | Dec 15 | 325 d | 10a |
| Skyforest | May 5 | Nov 2 | 181 d | 8a |
| Sloughhouse | Jan 12 | Dec 16 | 338 d | 9b |
| Smartsville | Apr 1 | Nov 17 | 230 d | 9b |
| Smith River | Jan 31 | Dec 27 | 330 d | 9b |
| Snelling | Mar 3 | Nov 24 | 266 d | 9b |
| Soda Springs | frost any month | 7a | ||
| Solana Beach | rare frost | 10b | ||
| Soledad | Apr 23 | Nov 3 | 194 d | 9b |
| Solvang | Apr 11 | Nov 8 | 211 d | 9a |
| Somerset | Apr 26 | Nov 2 | 190 d | 9a |
| Somes Bar | Mar 12 | Nov 26 | 259 d | 8b |
| Somis | Dec 31 | Dec 28 | 362 d | 10a |
| Sonoma | Mar 2 | Nov 27 | 270 d | 9b |
| Sonora | Apr 9 | Nov 9 | 214 d | 9a |
| Soquel | Jan 29 | Dec 13 | 318 d | 9b |
| Soulsbyville | Apr 9 | Nov 9 | 214 d | 8b |
| South Dos Palos | Jan 26 | Dec 10 | 318 d | 9a |
| South El Monte | Jan 4 | Jan 2 | 363 d | 10b |
| South Gate | rare frost | 10b | ||
| South Lake Tahoe | frost any month | 6b | ||
| South Pasadena | Jan 8 | Jan 7 | 364 d | 10a |
| South San Francisco | Dec 29 | Dec 26 | 362 d | 10a |
| Spreckels | Feb 4 | Dec 6 | 305 d | 9b |
| Spring Valley | Jan 6 | Dec 21 | 349 d | 10b |
| Springville | Jan 20 | Dec 13 | 327 d | 9b |
| Standard | Apr 9 | Nov 9 | 214 d | 9a |
| Standish | May 16 | Oct 8 | 145 d | 7a |
| Stanford | Feb 1 | Dec 7 | 309 d | 9b |
| Stanton | rare frost | 10a | ||
| Stevenson Ranch | Jan 8 | Jan 1 | 358 d | 10a |
| Stevinson | Mar 28 | Nov 14 | 231 d | 9a |
| Stewarts Point | Feb 26 | Dec 27 | 304 d | 10a |
| Stinson Beach | Jan 16 | Dec 18 | 336 d | 10a |
| Stirling City | Apr 17 | Nov 11 | 208 d | 8b |
| Stockton | Feb 5 | Dec 8 | 306 d | 9b |
| Stonyford | Apr 6 | Nov 10 | 218 d | 9a |
| Storrie | Apr 17 | Nov 11 | 208 d | 8b |
| Stratford | Feb 24 | Nov 22 | 271 d | 9a |
| Strathmore | Feb 20 | Nov 30 | 283 d | 9b |
| Strawberry | May 2 | Nov 4 | 186 d | 7b |
| Strawberry Valley | May 4 | Oct 30 | 179 d | 8a |
| Studio City | Jan 2 | Dec 26 | 358 d | 10a |
| Sugarloaf | May 27 | Oct 4 | 130 d | 7a |
| Suisun City | Jan 15 | Dec 14 | 333 d | 9b |
| Sultana | Jan 23 | Dec 13 | 324 d | 9b |
| Summerland | Jan 13 | Jan 6 | 358 d | 10b |
| Sun City | Jan 28 | Dec 18 | 324 d | 9b |
| Sun Valley | Dec 31 | Dec 28 | 362 d | 10a |
| Sunland | Dec 31 | Dec 28 | 362 d | 10a |
| Sunnyvale | Jan 6 | Dec 23 | 351 d | 10a |
| Sunol | Feb 15 | Dec 2 | 290 d | 9b |
| Sunset Beach | rare frost | 10b | ||
| Surfside | rare frost | 10b | ||
| Susanville | May 16 | Oct 8 | 145 d | 7a |
| Sutter | Jan 15 | Dec 12 | 331 d | 9b |
| Sutter Creek | Mar 4 | Dec 11 | 282 d | 9a |
| Sylmar | Jan 2 | Jan 1 | 364 d | 10a |