Aspen, CO 81642 Frost Dates
Frost dates for Aspen, CO, ZIP 81642
The NOAA station nearest to 81642 does not report a usable frost-date normal for either event, so no last-frost or first-frost figure is shown here. The USDA hardiness zone below is still real: Zone 5a (-20 to -15°F average annual minimum).
How Aspen compares
Aspen's growing season runs about 55 days, ranking 40,203 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 597 of 624.
Learn more
local microclimates explains what one yard in Aspen can differ from the 81642 normal, and the methodology explains exactly which NOAA and USDA figures feed 81642's numbers.