Westmorland, CA 92281 Frost Dates
When can you plant in Westmorland, CA?
The last spring frost here typically falls around 01/16, about 141 days from today. The first fall frost typically arrives around 12/19, about 335 frost-free days later.
The USDA Plant Hardiness Zone Map puts Westmorland in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 16 weeks of growing season left in Westmorland before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 01/16 isn't a guarantee
01/16 is the middle of 30 years of NOAA records, not a promise. Plant by 02/17 and you're betting against frost in roughly 9 years out of 10. 12/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Westmorland compares
About 335 days separate Westmorland's last and first frost, putting it 2,752 of 40,283 ZIP codes nationally. Within CA, it ranks 1,243 of 2,555.
Learn more
zone vs. frost date covers why Zone 9b and Westmorland's frost date answer different questions. the frost range covers how to read the range around Westmorland's dates instead of trusting one.