Tooele, UT 84074 Frost Dates
Frost dates for Tooele, UT, ZIP 84074
Typically, the last spring freeze lands around 05/02, roughly 247 days out. The first fall frost typically arrives around 10/16, about 165 frost-free days later.
Tooele sits in USDA Zone 7a (0 to 5°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 7a around Tooele 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
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/16 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tooele compares
About 165 days separate Tooele's last and first frost, putting it 30,507 of 40,283 ZIP codes nationally. Within UT, it ranks 142 of 344.
Learn more
zone vs. frost date explains why Zone 7a and Tooele's frost date answer different questions, and the frost range explains how to read the range around Tooele's dates instead of trusting one.