Elmo, UT 84521 Frost Dates
Frost dates for Elmo, UT, ZIP 84521
Around 05/27 is the usual last spring frost, about 272 days away. The first fall frost typically arrives around 09/26, about 122 frost-free days later.
The USDA Plant Hardiness Zone Map puts Elmo in Zone 6a (-10 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 6a around Elmo has about 4 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
05/27 is the middle of 30 years of NOAA records, not a promise. Plant by 05/11 and you're betting against frost in roughly 9 years out of 10. 06/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Elmo compares
Elmo's growing season runs about 122 days, ranking 38,973 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 282 of 344.
Learn more
the frost range explains how to read the range around Elmo's dates instead of trusting one, and local microclimates explains what one yard in Elmo can differ from the 84521 normal.