Millcreek, UT 84124 Frost Dates
Frost dates for Millcreek, UT, ZIP 84124
Typically, the last spring freeze lands around 05/07, roughly 252 days out. The first fall frost typically arrives around 10/14, about 158 frost-free days later.
Millcreek sits in USDA Zone 7b (5 to 10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 7b around Millcreek 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.
Why 05/07 isn't a guarantee
05/07 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. 05/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Millcreek compares
Millcreek's growing season runs about 158 days, ranking 32,872 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 174 of 344.
Learn more
local microclimates explains what one yard in Millcreek can differ from the 84124 normal, and zone vs. frost date explains why Zone 7b and Millcreek's frost date answer different questions.