Mantua, UT 84324 Frost Dates
Frost dates for Mantua, UT, ZIP 84324
Typically, the last spring freeze lands around 05/05, roughly 250 days out. The first fall frost typically arrives around 10/05, about 150 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 Mantua, not a forecast for this year.
What to do before the first frost
Zone 6a around Mantua has about 5 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 05/05 isn't a guarantee
05/05 is the middle of 30 years of NOAA records, not a promise. Plant by 04/20 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mantua compares
At roughly 150 frost-free days, Mantua places 35,332 of 40,283 ZIP codes in this dataset. Within UT, it ranks 199 of 344.
Learn more
the frost range explains how to read the range around Mantua's dates instead of trusting one, and local microclimates explains what one yard in Mantua can differ from the 84324 normal.