Silverthorne, CO 80498 Frost Dates
Frost dates for Silverthorne, CO, ZIP 80498
The NOAA station nearest to 80498 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 Silverthorne compares
At roughly 41 frost-free days, Silverthorne places 40,245 of 40,283 ZIP codes in this dataset. Within CO, it ranks 609 of 624.
Learn more
local microclimates explains what one yard in Silverthorne can differ from the 80498 normal, and the methodology explains exactly which NOAA and USDA figures feed 80498's numbers.