Riverton, UT 84065 Frost Dates
Riverton, UT: when does the frost end?
Around 05/03 is the usual last spring frost, about 248 days away. Fall's first freeze usually shows up around 10/12, roughly 159 days after the last spring frost.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Riverton, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Riverton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Riverton's last frost
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/26 and only about 1 year in 10 sees frost after that.
Riverton against the rest of the dataset
Riverton's growing season runs about 159 days, ranking 32,583 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 161 of 344.
Learn more
Before leaning on 84065's figures: local microclimates explains what one yard in Riverton can differ from the 84065 normal, while zone vs. frost date explains why Zone 7a and Riverton's frost date answer different questions.