Lyman, UT 84749 Frost Dates
Frost dates for Lyman, UT, ZIP 84749
The last spring frost here typically falls around 04/22, about 237 days from today. The first fall frost typically arrives around 10/23, about 183 frost-free days later.
Lyman sits in USDA Zone 6a (-10 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.
What to do before the first frost
Zone 6a around Lyman has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Lyman's last frost
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lyman compares
Lyman's growing season runs about 183 days, ranking 24,023 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 96 of 344.
Learn more
the frost range explains how to read the range around Lyman's dates instead of trusting one, and local microclimates explains what one yard in Lyman can differ from the 84749 normal.