Ogden, UT 84409 Frost Dates
84409, near Ogden, UT: the frost window
Around 04/21 is the usual last spring frost, about 236 days away. Fall's first freeze usually shows up around 10/23, roughly 184 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Ogden in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Ogden's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Ogden against the rest of the dataset
At roughly 184 frost-free days, Ogden places 23,395 of 40,283 ZIP codes in this dataset. Within UT, it ranks 91 of 344.
Learn more
Two guides worth reading on 84409: local microclimates, on what one yard in Ogden can differ from the 84409 normal, and zone vs. frost date, on why Zone 7a and Ogden's frost date answer different questions.