Morgan Hill, CA 95053 Frost Dates
When can you plant in Morgan Hill, CA?
Around 05/03 is the usual last spring frost, about 248 days away. The first fall frost typically arrives around 11/18, about 197 frost-free days later.
The USDA Plant Hardiness Zone Map puts Morgan Hill 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 12 weeks of growing season left in Morgan Hill before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/07 and you're betting against frost in roughly 9 years out of 10. 06/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Morgan Hill compares
About 197 days separate Morgan Hill's last and first frost, putting it 18,594 of 40,283 ZIP codes nationally. Within CA, it ranks 2,266 of 2,555.
Learn more
local microclimates covers what one yard in Morgan Hill can differ from the 95053 normal. zone vs. frost date covers why Zone 9b and Morgan Hill's frost date answer different questions.