Alpine, UT 84004 Frost Dates
Frost dates for Alpine, UT, ZIP 84004
The last spring frost here typically falls around 05/03, about 248 days from today. The first fall frost typically arrives around 10/12, about 159 frost-free days later.
Zone 7a (0 to 5°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 Alpine, not a forecast for this year.
What to do before the first frost
Zone 7a around Alpine has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Alpine compares
About 159 days separate Alpine's last and first frost, putting it 32,621 of 40,283 ZIP codes nationally. Within UT, it ranks 164 of 344.
Learn more
local microclimates explains what one yard in Alpine can differ from the 84004 normal, and zone vs. frost date explains why Zone 7a and Alpine's frost date answer different questions.