Avon, CO 81620 Frost Dates
Avon, CO: when does the frost end?
Typically, the last spring freeze lands around 06/21, roughly 297 days out. Fall's first freeze usually shows up around 09/07, roughly 77 days after the last spring frost.
Avon 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.
Stretching the season past the first frost
With roughly 1 week until Avon's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Avon's last frost
06/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 06/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 07/09 and only about 1 year in 10 sees frost after that.
Avon against the rest of the dataset
About 77 days separate Avon's last and first frost, putting it 40,066 of 40,283 ZIP codes nationally. Within CO, it ranks 569 of 624.
Learn more
Before leaning on 81620's figures: the frost range explains how to read the range around Avon's dates instead of trusting one, while local microclimates explains what one yard in Avon can differ from the 81620 normal.