Avon, CO 81655 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.
The USDA Plant Hardiness Zone Map puts Avon in Zone 6a (-10 to -5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's 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
Avon's growing season runs about 77 days, ranking 40,068 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 571 of 624.
Learn more
Before leaning on 81655's figures: local microclimates explains what one yard in Avon can differ from the 81655 normal, while zone vs. frost date explains why Zone 6a and Avon's frost date answer different questions.