Blythe, CA 85334 Frost Dates
85334, near Blythe, CA: the frost window
Around 01/04 is the usual last spring frost, about 129 days away. Fall's first freeze usually shows up around 12/19, roughly 347 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Blythe in Zone 9b (25 to 30°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
Blythe's growing season runs out in roughly 16 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 01/04 isn't a guarantee
01/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/16 and only about 1 year in 10 sees frost after that.
Blythe against the rest of the dataset
About 347 days separate Blythe's last and first frost, putting it 2,396 of 40,283 ZIP codes nationally. Within CA, it ranks 1,083 of 2,555.
Learn more
Two guides worth reading on 85334: zone vs. frost date, on why Zone 9b and Blythe's frost date answer different questions, and the frost range, on how to read the range around Blythe's dates instead of trusting one.