Fountain Green, UT 84632 Frost Dates
Frost dates for Fountain Green, UT, ZIP 84632
Typically, the last spring freeze lands around 05/26, roughly 271 days out. The first fall frost typically arrives around 09/25, about 119 frost-free days later.
Zone 5b (-15 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 Fountain Green, not a forecast for this year.
What to do before the first frost
Zone 5b around Fountain Green 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.
Why 05/26 isn't a guarantee
05/26 is the middle of 30 years of NOAA records, not a promise. Plant by 05/10 and you're betting against frost in roughly 9 years out of 10. 06/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fountain Green compares
At roughly 119 frost-free days, Fountain Green places 39,151 of 40,283 ZIP codes in this dataset. Within UT, it ranks 300 of 344.
Learn more
zone vs. frost date explains why Zone 5b and Fountain Green's frost date answer different questions, and the frost range explains how to read the range around Fountain Green's dates instead of trusting one.