Frost dates in San Bernardino County, California
The average last spring frost in San Bernardino County falls Jan 3 to May 27 and the average first fall frost Oct 4 to Jan 2 (next year), depending on the ZIP code (50% odds, 32°F, NOAA 1991–2020 normals). USDA hardiness zone 10a to 9b. Places: Adelanto, Apple Valley, Baker, Barstow, Big Bear City, Big Bear Lake. Pick a ZIP for 10% and 90% odds, soil temperature and the 7-day freeze forecast.
| ZIP | Place | Last spring frost | First fall frost | Zone |
|---|---|---|---|---|
| 91701 | Rancho Cucamonga | Jan 4 | Dec 30 | 10a |
| 91708 | Chino | Jan 17 | Dec 19 | 9b |
| 91709 | Chino Hills | Jan 17 | Dec 19 | 10a |
| 91710 | Chino | Jan 17 | Dec 19 | 10a |
| 91730 | Rancho Cucamonga | Jan 4 | Dec 30 | 10a |
| 91737 | Rancho Cucamonga | Jan 4 | Dec 30 | 10a |
| 91739 | Rancho Cucamonga | Jan 4 | Dec 30 | 10a |
| 91761 | Ontario | Jan 4 | Dec 30 | 10a |
| 91762 | Ontario | Jan 4 | Dec 30 | 10a |
| 91763 | Montclair | Jan 8 | Dec 28 | 10a |
| 91764 | Ontario | Jan 4 | Dec 30 | 10a |
| 91784 | Upland | Jan 4 | Dec 30 | 10a |
| 91786 | Upland | Jan 4 | Dec 30 | 10a |
| 92242 | Big River | Jan 12 | Dec 19 | 9b |
| 92252 | Joshua Tree | Feb 28 | Dec 1 | 9a |
| 92256 | Morongo Valley | Feb 25 | Dec 15 | 9b |
| 92267 | Jan 7 | Dec 31 | 10a | |
| 92268 | Feb 25 | Dec 15 | 9a | |
| 92277 | Twentynine Palms | Jan 24 | Dec 10 | 9b |
| 92278 | Twentynine Palms | Jan 24 | Dec 10 | 9b |
| 92280 | Jan 3 | Dec 31 | 9b | |
| 92284 | Yucca Valley | Mar 14 | Nov 28 | 9a |
| 92285 | Homestead Valley | Mar 1 | Nov 29 | 9a |
| 92301 | Adelanto | Mar 21 | Nov 12 | 8b |
| 92304 | Mar 6 | Dec 8 | 9b | |
| 92305 | May 27 | Oct 4 | 7a | |
| 92307 | Apple Valley | Mar 18 | Nov 11 | 8b |
| 92308 | Apple Valley | Mar 18 | Nov 11 | 8b |
| 92309 | Baker | Feb 14 | Nov 27 | 9a |
| 92310 | Feb 19 | Nov 26 | 9a | |
| 92311 | Barstow | Feb 22 | Nov 23 | 9a |
| 92313 | Grand Terrace | Jan 10 | Jan 2 (next year) | 10a |
| 92314 | Big Bear City | May 27 | Oct 4 | 7a |
| 92315 | Big Bear Lake | May 27 | Oct 4 | 7b |
| 92316 | Bloomington | Jan 10 | Jan 2 (next year) | 10a |
| 92317 | Lake Arrowhead | May 5 | Nov 2 | 8a |
| 92321 | Lake Arrowhead | May 5 | Nov 2 | 8a |
| 92322 | Crestline | May 5 | Nov 2 | 8b |
| 92324 | Colton | Jan 27 | Dec 19 | 10a |
| 92325 | Crestline | May 5 | Nov 2 | 8b |
| 92327 | Feb 19 | Nov 26 | 9a | |
| 92332 | Mar 6 | Dec 8 | 9a | |
| 92333 | May 27 | Oct 4 | 7a | |
| 92335 | Fontana | Jan 4 | Dec 30 | 10a |
| 92336 | Fontana | Jan 4 | Dec 30 | 10a |
| 92337 | Fontana | Jan 9 | Dec 30 | 10a |
| 92338 | Feb 19 | Nov 26 | 9a | |
| 92339 | May 27 | Oct 4 | 7b | |
| 92341 | May 5 | Nov 2 | 7b | |
| 92342 | Silver Lakes | Mar 18 | Nov 11 | 8b |
| 92344 | Oak Hills | Mar 18 | Nov 11 | 8b |
| 92345 | Hesperia | Feb 28 | Dec 1 | 8b |
| 92346 | Highland | Jan 27 | Dec 19 | 10a |
| 92347 | Feb 22 | Nov 23 | 9a | |
| 92350 | Loma Linda | Jan 27 | Dec 19 | 10a |
| 92352 | Lake Arrowhead | May 5 | Nov 2 | 8b |
| 92354 | Loma Linda | Jan 27 | Dec 19 | 10a |
| 92356 | Lucerne Valley | May 27 | Oct 4 | 8b |
| 92358 | Lytle Creek | May 16 | Oct 13 | 8a |
| 92359 | Mentone | Jan 27 | Dec 19 | 10a |
| 92363 | Needles | Jan 6 | Jan 2 (next year) | 10a |
| 92364 | Mar 6 | Dec 8 | 8b | |
| 92365 | Feb 19 | Nov 26 | 9a | |
| 92368 | Mar 18 | Nov 11 | 8b | |
| 92369 | San Bernardino | Jan 27 | Dec 19 | 10a |
| 92371 | Phelan | May 16 | Oct 13 | 8b |
| 92372 | Piñon Hills | May 16 | Oct 13 | 8b |
| 92373 | Redlands | Jan 27 | Dec 19 | 9b |
| 92374 | Redlands | Jan 27 | Dec 19 | 10a |
| 92376 | Rialto | Jan 10 | Jan 2 (next year) | 10a |
| 92377 | Rialto | Jan 10 | Jan 2 (next year) | 10a |
| 92378 | Lake Arrowhead | May 5 | Nov 2 | 8a |
| 92382 | Running Springs | May 5 | Nov 2 | 8a |
| 92385 | Lake Arrowhead | May 5 | Nov 2 | 8a |
| 92386 | Big Bear City | May 27 | Oct 4 | 7a |
| 92391 | Lake Arrowhead | May 5 | Nov 2 | 8a |
| 92392 | Victorville | Mar 18 | Nov 11 | 8b |
| 92394 | Victorville | Mar 18 | Nov 11 | 8b |
| 92395 | Victorville | Mar 18 | Nov 11 | 8b |
| 92398 | Yermo | Feb 19 | Nov 26 | 9a |
| 92399 | Yucaipa | Jan 27 | Dec 19 | 9b |
| 92401 | San Bernardino | Jan 27 | Dec 19 | 10a |
| 92404 | San Bernardino | May 5 | Nov 2 | 10a |
| 92405 | San Bernardino | May 5 | Nov 2 | 10a |
| 92407 | San Bernardino | May 5 | Nov 2 | 10a |
| 92408 | San Bernardino | Jan 27 | Dec 19 | 10a |
| 92410 | San Bernardino | Jan 27 | Dec 19 | 10a |
| 92411 | San Bernardino | Jan 27 | Dec 19 | 10a |
| 92415 | San Bernardino | Jan 27 | Dec 19 | 10a |
| 93558 | Mar 19 | Nov 25 | 9a | |
| 93562 | Searles Valley | Feb 15 | Nov 28 | 9a |
Nearby counties
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All California counties · Download California frost dates (CSV)
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