Salt Lake City, UT 84116 Frost Dates
Salt Lake City, UT: when does the frost end?
Typically, the last spring freeze lands around 04/08, roughly 223 days out. Fall's first freeze usually shows up around 10/31, roughly 204 days after the last spring frost.
Salt Lake City sits in USDA Zone 7b (5 to 10°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
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.
Why 04/08 isn't a guarantee
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
Salt Lake City's growing season runs about 204 days, ranking 16,445 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 25 of 344.
Learn more
Before leaning on 84116'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.