Trenton, UT 84338 Frost Dates
Trenton, UT: when does the frost end?
Typically, the last spring freeze lands around 05/17, roughly 262 days out. Fall's first freeze usually shows up around 09/18, roughly 121 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Trenton in Zone 5b (-15 to -10°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 3 weeks until Trenton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Trenton's last frost
05/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/06 and only about 1 year in 10 sees frost after that.
Trenton against the rest of the dataset
About 121 days separate Trenton's last and first frost, putting it 39,036 of 40,283 ZIP codes nationally. Within UT, it ranks 287 of 344.
Learn more
Before leaning on 84338's figures: zone vs. frost date explains why Zone 5b and Trenton's frost date answer different questions, while the frost range explains how to read the range around Trenton's dates instead of trusting one.