Spanish Fork, UT 84660 Frost Dates
Frost dates for Spanish Fork, UT, ZIP 84660
Around 04/25 is the usual last spring frost, about 240 days away. The first fall frost typically arrives around 10/18, about 174 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Spanish Fork, not a forecast for this year.
What to do before the first frost
Zone 6a around Spanish Fork has about 7 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 Spanish Fork's last frost
04/25 is the middle of 30 years of NOAA records, not a promise. Plant by 04/10 and you're betting against frost in roughly 9 years out of 10. 05/13 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Spanish Fork compares
About 174 days separate Spanish Fork's last and first frost, putting it 27,332 of 40,283 ZIP codes nationally. Within UT, it ranks 121 of 344.
Learn more
local microclimates explains what one yard in Spanish Fork can differ from the 84660 normal, and zone vs. frost date explains why Zone 6a and Spanish Fork's frost date answer different questions.