Highland, CA 92382 Frost Dates
Highland, CA: when does the frost end?
The last spring frost here typically falls around 05/05, about 250 days from today. Fall's first freeze usually shows up around 11/02, roughly 176 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Highland in Zone 8a (10 to 15°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 9 weeks until Highland's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/31 and only about 1 year in 10 sees frost after that.
Highland against the rest of the dataset
Highland's growing season runs about 176 days, ranking 26,354 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,356 of 2,555.
Learn more
Before leaning on 92382's figures: zone vs. frost date explains why Zone 8a and Highland's frost date answer different questions, while the frost range explains how to read the range around Highland's dates instead of trusting one.