Grand Lake, CO 80447 Frost Dates
Grand Lake, CO: when does the frost end?
The NOAA station nearest to 80447 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).
Grand Lake against the rest of the dataset
Grand Lake's growing season runs about 54 days, ranking 40,207 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 600 of 624.
Learn more
Before leaning on 80447's figures: local microclimates explains what one yard in Grand Lake can differ from the 80447 normal, while the methodology explains exactly which NOAA and USDA figures feed 80447's numbers.