Salt Lake City, UT 84101 Frost Dates
Salt Lake City, UT: when does the frost end?
Around 04/08 is the usual last spring frost, about 223 days away. Fall's first freeze usually shows up around 10/31, roughly 204 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Salt Lake City in Zone 7b (5 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 9 weeks until Salt Lake City's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Salt Lake City's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Salt Lake City against the rest of the dataset
About 204 days separate Salt Lake City's last and first frost, putting it 16,440 of 40,283 ZIP codes nationally. Within UT, it ranks 20 of 344.
Learn more
Before leaning on 84101's figures: zone vs. frost date explains why Zone 7b and Salt Lake City's frost date answer different questions, while the frost range explains how to read the range around Salt Lake City's dates instead of trusting one.