Morgan Hill, CA 95155 Frost Dates
Morgan Hill, CA: when does the frost end?
The last spring frost here typically falls around 05/03, about 248 days from today. 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.
Why 05/03 isn't a guarantee
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 18,607 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,279 of 2,555.
Learn more
Before leaning on 95155's figures: zone vs. frost date explains why Zone 9b and Morgan Hill's frost date answer different questions, while the frost range explains how to read the range around Morgan Hill's dates instead of trusting one.