Mona, UT 84645 Frost Dates
84645, near Mona, UT: the frost window
Around 05/06 is the usual last spring frost, about 251 days away. Fall's first freeze usually shows up around 10/10, roughly 156 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Mona 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
Mona'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.
The actual range around Mona's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/24 and only about 1 year in 10 sees frost after that.
Mona against the rest of the dataset
About 156 days separate Mona's last and first frost, putting it 33,667 of 40,283 ZIP codes nationally. Within UT, it ranks 183 of 344.
Learn more
Two guides worth reading on 84645: the frost range, on how to read the range around Mona's dates instead of trusting one, and local microclimates, on what one yard in Mona can differ from the 84645 normal.