Ogden, UT 84415 Frost Dates
Frost dates for Ogden, UT, ZIP 84415
Typically, the last spring freeze lands around 04/21, roughly 236 days out. The first fall frost typically arrives around 10/23, about 184 frost-free days later.
The USDA Plant Hardiness Zone Map puts Ogden 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
Zone 6b around Ogden 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.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/06 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ogden compares
At roughly 184 frost-free days, Ogden places 23,397 of 40,283 ZIP codes in this dataset. Within UT, it ranks 93 of 344.
Learn more
the frost range explains how to read the range around Ogden's dates instead of trusting one, and local microclimates explains what one yard in Ogden can differ from the 84415 normal.