Eagle, CO 81631 Frost Dates
81631, near Eagle, CO: the frost window
The NOAA station nearest to 81631 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 5b (-15 to -10°F average annual minimum).
Eagle against the rest of the dataset
Eagle's growing season runs about 55 days, ranking 40,202 of 40,283 US ZIP codes measured here, longest to shortest. Within CO, it ranks 596 of 624.
Learn more
Two guides worth reading on 81631: zone vs. frost date, on why Zone 5b and Eagle's frost date answer different questions, and local microclimates, on what one yard in Eagle can differ from the 81631 normal.