Morgan Hill, CA 95013 Frost Dates
When can you plant in Morgan Hill, CA?
The last spring frost here typically falls around 05/03, about 248 days from today. The first fall frost typically arrives around 11/18, about 197 frost-free days later.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Morgan Hill, not a forecast for this year.
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.
Why 05/03 isn't a guarantee
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
At roughly 197 frost-free days, Morgan Hill places 18,586 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,258 of 2,555.
Learn more
zone vs. frost date covers why Zone 9b and Morgan Hill's frost date answer different questions. the frost range covers how to read the range around Morgan Hill's dates instead of trusting one.