Monticello, UT 84530 Frost Dates
84530, near Monticello, UT: the frost window
The last spring frost here typically falls around 05/17, about 262 days from today. Fall's first freeze usually shows up around 10/06, roughly 141 days after the last spring frost.
Monticello 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.
Stretching the season past the first frost
Monticello's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Monticello against the rest of the dataset
About 141 days separate Monticello's last and first frost, putting it 36,918 of 40,283 ZIP codes nationally. Within UT, it ranks 219 of 344.
Learn more
Two guides worth reading on 84530: local microclimates, on what one yard in Monticello can differ from the 84530 normal, and zone vs. frost date, on why Zone 7a and Monticello's frost date answer different questions.