Morgan Hill, CA 95159 Frost Dates
Morgan Hill, CA: when does the frost end?
Typically, the last spring freeze lands around 05/03, roughly 248 days out. Fall's first freeze usually shows up around 11/18, roughly 197 days after the last spring frost.
Morgan Hill sits in USDA Zone 9b (25 to 30°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a 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
Morgan Hill's growing season runs about 197 days, ranking 18,611 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,283 of 2,555.
Learn more
Before leaning on 95159's figures: local microclimates explains what one yard in Morgan Hill can differ from the 95159 normal, while zone vs. frost date explains why Zone 9b and Morgan Hill's frost date answer different questions.