Glenwood, UT 84730 Frost Dates
Frost dates for Glenwood, UT, ZIP 84730
Typically, the last spring freeze lands around 05/21, roughly 266 days out. The first fall frost typically arrives around 09/24, about 125 frost-free days later.
Zone 6a (-10 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 Glenwood, not a forecast for this year.
What to do before the first frost
Zone 6a around Glenwood 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.
The actual range around Glenwood's last frost
05/21 is the middle of 30 years of NOAA records, not a promise. Plant by 05/04 and you're betting against frost in roughly 9 years out of 10. 06/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Glenwood compares
About 125 days separate Glenwood's last and first frost, putting it 38,791 of 40,283 ZIP codes nationally. Within UT, it ranks 268 of 344.
Learn more
local microclimates explains what one yard in Glenwood can differ from the 84730 normal, and zone vs. frost date explains why Zone 6a and Glenwood's frost date answer different questions.