Alturas, CA 96110 Frost Dates
Alturas, CA: when does the frost end?
The last spring frost here typically falls around 06/14, about 290 days from today. Fall's first freeze usually shows up around 09/18, roughly 94 days after the last spring frost.
Alturas sits in USDA Zone 6b (-5 to 0°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 3 weeks until Alturas's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 06/14 isn't a guarantee
06/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 07/03 and only about 1 year in 10 sees frost after that.
Alturas against the rest of the dataset
About 94 days separate Alturas's last and first frost, putting it 39,826 of 40,283 ZIP codes nationally. Within CA, it ranks 2,529 of 2,555.
Learn more
Before leaning on 96110's figures: zone vs. frost date explains why Zone 6b and Alturas's frost date answer different questions, while the frost range explains how to read the range around Alturas's dates instead of trusting one.