Avon, CO 81658 Frost Dates
When can you plant in Avon, CO?
Typically, the last spring freeze lands around 06/21, roughly 297 days out. The first fall frost typically arrives around 09/07, about 77 frost-free days later.
Avon sits in USDA Zone 5a (-20 to -15°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
About 1 week of growing season left in Avon before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 06/21 isn't a guarantee
06/21 is the middle of 30 years of NOAA records, not a promise. Plant by 06/08 and you're betting against frost in roughly 9 years out of 10. 07/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Avon compares
At roughly 77 frost-free days, Avon places 40,069 of 40,283 ZIP codes in this dataset. Within CO, it ranks 572 of 624.
Learn more
the frost range covers how to read the range around Avon's dates instead of trusting one. local microclimates covers what one yard in Avon can differ from the 81658 normal.