Chino, CA 91710 Frost Dates
Chino, CA: when does the frost end?
The last spring frost here typically falls around 01/17, about 142 days from today. Fall's first freeze usually shows up around 12/19, roughly 335 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Chino in Zone 10a (30 to 35°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 16 weeks until Chino's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/17 isn't a guarantee
01/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/18 and only about 1 year in 10 sees frost after that.
Chino against the rest of the dataset
Chino's growing season runs about 335 days, ranking 2,737 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,233 of 2,555.
Learn more
Before leaning on 91710's figures: the frost range explains how to read the range around Chino's dates instead of trusting one, while local microclimates explains what one yard in Chino can differ from the 91710 normal.