Vernon, UT 84080 Frost Dates
Vernon, UT: when does the frost end?
Typically, the last spring freeze lands around 06/02, roughly 278 days out. Fall's first freeze usually shows up around 09/16, roughly 103 days after the last spring frost.
Zone 6b (-5 to 0°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 Vernon, not a forecast for this year.
Stretching the season past the first frost
With roughly 3 weeks until Vernon's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 06/02 isn't a guarantee
06/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/24 and only about 1 year in 10 sees frost after that.
Vernon against the rest of the dataset
Vernon's growing season runs about 103 days, ranking 39,630 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 334 of 344.
Learn more
Before leaning on 84080's figures: zone vs. frost date explains why Zone 6b and Vernon's frost date answer different questions, while the frost range explains how to read the range around Vernon's dates instead of trusting one.