Midvale, UT 84047 Frost Dates
When can you plant in Midvale, UT?
Around 05/03 is the usual last spring frost, about 248 days away. The first fall frost typically arrives around 10/12, about 159 frost-free days later.
Midvale 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.
What to do before the first frost
About 6 weeks of growing season left in Midvale before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Midvale compares
Midvale's growing season runs about 159 days, ranking 32,584 of 40,283 US ZIP codes measured here, longest to shortest. Within UT, it ranks 162 of 344.
Learn more
zone vs. frost date covers why Zone 7b and Midvale's frost date answer different questions. the frost range covers how to read the range around Midvale's dates instead of trusting one.