Mount Shasta, CA 96067 Frost Dates
When can you plant in Mount Shasta, CA?
The last spring frost here typically falls around 05/15, about 260 days from today. The first fall frost typically arrives around 10/06, about 143 frost-free days later.
Zone 8a (10 to 15°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Mount Shasta, not a forecast for this year.
What to do before the first frost
About 6 weeks of growing season left in Mount Shasta before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Mount Shasta's last frost
05/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/29 and you're betting against frost in roughly 9 years out of 10. 06/05 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mount Shasta compares
Mount Shasta's growing season runs about 143 days, ranking 36,526 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,444 of 2,555.
Learn more
zone vs. frost date covers why Zone 8a and Mount Shasta's frost date answer different questions. the frost range covers how to read the range around Mount Shasta's dates instead of trusting one.