Aguilar, CO 81020 Frost Dates
Frost dates for Aguilar, CO, ZIP 81020
Typically, the last spring freeze lands around 05/06, roughly 251 days out. The first fall frost typically arrives around 10/04, about 149 frost-free days later.
Aguilar sits in USDA Zone 6a (-10 to -5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
Zone 6a around Aguilar has about 5 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.
How much risk comes with planting early here
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/24 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Aguilar compares
Aguilar's growing season runs about 149 days, ranking 35,562 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 339 of 624.
Learn more
the frost range explains how to read the range around Aguilar's dates instead of trusting one, and local microclimates explains what one yard in Aguilar can differ from the 81020 normal.