Vernon, UT 84022 Frost Dates
Vernon, UT: when does the frost end?
Around 05/15 is the usual last spring frost, about 260 days away. Fall's first freeze usually shows up around 10/05, roughly 142 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Vernon in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 5 weeks until Vernon's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 05/15 isn't a guarantee
05/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/04 and only about 1 year in 10 sees frost after that.
Vernon against the rest of the dataset
About 142 days separate Vernon's last and first frost, putting it 36,819 of 40,283 ZIP codes nationally. Within UT, it ranks 218 of 344.
Learn more
Before leaning on 84022'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.