Morgan Hill, CA 95164 Frost Dates
Morgan Hill, CA: when does the frost end?
Around 05/03 is the usual last spring frost, about 248 days away. Fall's first freeze usually shows up around 11/18, roughly 197 days after the last spring frost.
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.
Stretching the season past the first frost
With roughly 12 weeks until Morgan Hill's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Morgan Hill against the rest of the dataset
About 197 days separate Morgan Hill's last and first frost, putting it 18,614 of 40,283 ZIP codes nationally. Within CA, it ranks 2,286 of 2,555.
Learn more
Before leaning on 95164's figures: the frost range explains how to read the range around Morgan Hill's dates instead of trusting one, while local microclimates explains what one yard in Morgan Hill can differ from the 95164 normal.