Bishop, CA 93545 Frost Dates
93545, near Bishop, CA: the frost window
Typically, the last spring freeze lands around 06/08, roughly 284 days out. Fall's first freeze usually shows up around 09/20, roughly 100 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bishop 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
Bishop's growing season runs out in roughly 3 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 06/08 isn't a guarantee
06/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/29 and only about 1 year in 10 sees frost after that.
Bishop against the rest of the dataset
About 100 days separate Bishop's last and first frost, putting it 39,711 of 40,283 ZIP codes nationally. Within CA, it ranks 2,523 of 2,555.
Learn more
Two guides worth reading on 93545: zone vs. frost date, on why Zone 8a and Bishop's frost date answer different questions, and the frost range, on how to read the range around Bishop's dates instead of trusting one.