Millcreek, UT 84108 Frost Dates
When can you plant in Millcreek, UT?
The last spring frost here typically falls around 05/07, about 252 days from today. The first fall frost typically arrives around 10/14, about 158 frost-free days later.
The USDA Plant Hardiness Zone Map puts Millcreek in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 7 weeks of growing season left in Millcreek before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/07 is the middle of 30 years of NOAA records, not a promise. Plant by 04/21 and you're betting against frost in roughly 9 years out of 10. 05/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Millcreek compares
Millcreek's growing season runs about 158 days, ranking 32,870 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 172 of 344.
Learn more
local microclimates covers what one yard in Millcreek can differ from the 84108 normal. zone vs. frost date covers why Zone 6b and Millcreek's frost date answer different questions.