Fort Morgan, CO 80701 Frost Dates
Frost dates for Fort Morgan, CO, ZIP 80701
Typically, the last spring freeze lands around 05/06, roughly 251 days out. The first fall frost typically arrives around 10/06, about 153 frost-free days later.
Zone 5b (-15 to -10°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 Fort Morgan, not a forecast for this year.
What to do before the first frost
Zone 5b around Fort Morgan 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 Fort Morgan's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/23 and you're betting against frost in roughly 9 years out of 10. 05/19 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fort Morgan compares
Fort Morgan's growing season runs about 153 days, ranking 34,494 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 272 of 624.
Learn more
the frost range explains how to read the range around Fort Morgan's dates instead of trusting one, and local microclimates explains what one yard in Fort Morgan can differ from the 80701 normal.