Morgan Hill, CA 95191 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.
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.
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
At roughly 197 frost-free days, Morgan Hill places 18,619 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,291 of 2,555.
Learn more
Before leaning on 95191's figures: local microclimates explains what one yard in Morgan Hill can differ from the 95191 normal, while zone vs. frost date explains why Zone 9b and Morgan Hill's frost date answer different questions.