Salt Lake City, UT 84111 Frost Dates
Frost dates for Salt Lake City, UT, ZIP 84111
Around 04/08 is the usual last spring frost, about 223 days away. The first fall frost typically arrives around 10/31, about 204 frost-free days later.
Zone 7b (5 to 10°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 Salt Lake City, not a forecast for this year.
What to do before the first frost
Zone 7b around Salt Lake City has about 9 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 04/08 isn't a guarantee
04/08 is the middle of 30 years of NOAA records, not a promise. Plant by 03/17 and you're betting against frost in roughly 9 years out of 10. 04/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Salt Lake City compares
About 204 days separate Salt Lake City's last and first frost, putting it 16,444 of 40,283 ZIP codes nationally. Within UT, it ranks 24 of 344.
Learn more
local microclimates explains what one yard in Salt Lake City can differ from the 84111 normal, and zone vs. frost date explains why Zone 7b and Salt Lake City's frost date answer different questions.