Bluff, UT 86545 Frost Dates
Frost dates for Bluff, UT, ZIP 86545
The last spring frost here typically falls around 05/03, about 248 days from today. The first fall frost typically arrives around 10/17, about 163 frost-free days later.
The USDA Plant Hardiness Zone Map puts Bluff in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 7a around Bluff has about 7 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.
How much risk comes with planting early here
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bluff compares
About 163 days separate Bluff's last and first frost, putting it 31,536 of 40,283 ZIP codes nationally. Within UT, it ranks 146 of 344.
Learn more
local microclimates explains what one yard in Bluff can differ from the 86545 normal, and zone vs. frost date explains why Zone 7a and Bluff's frost date answer different questions.