Morgan Hill, CA 95194 Frost Dates
Frost dates for Morgan Hill, CA, ZIP 95194
Typically, the last spring freeze lands around 05/03, roughly 248 days out. The first fall frost typically arrives around 11/18, about 197 frost-free days later.
Zone 10a (30 to 35°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
Zone 10a around Morgan Hill has about 12 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Morgan Hill's last frost
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
Morgan Hill's growing season runs about 197 days, ranking 18,621 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,293 of 2,555.
Learn more
zone vs. frost date explains why Zone 10a and Morgan Hill's frost date answer different questions, and the frost range explains how to read the range around Morgan Hill's dates instead of trusting one.