Greeley, CO 80634 Frost Dates
Frost dates for Greeley, CO, ZIP 80634
Around 05/02 is the usual last spring frost, about 247 days away. The first fall frost typically arrives around 10/08, about 159 frost-free days later.
The USDA Plant Hardiness Zone Map puts Greeley in Zone 5b (-15 to -10°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 5b around Greeley has about 6 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 Greeley's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Greeley compares
About 159 days separate Greeley's last and first frost, putting it 32,569 of 40,283 ZIP codes nationally. Within CO, it ranks 108 of 624.
Learn more
the frost range explains how to read the range around Greeley's dates instead of trusting one, and local microclimates explains what one yard in Greeley can differ from the 80634 normal.