Morgan Hill, CA 95052 Frost Dates
95052, near Morgan Hill, CA: the frost window
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
Morgan Hill's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
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 18,593 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,265 of 2,555.
Learn more
Two guides worth reading on 95052: zone vs. frost date, on why Zone 9b and Morgan Hill's frost date answer different questions, and the frost range, on how to read the range around Morgan Hill's dates instead of trusting one.