Granby, CO 80478 Frost Dates
Frost dates for Granby, CO, ZIP 80478
The NOAA station nearest to 80478 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).
How Granby compares
About 32 days separate Granby's last and first frost, putting it 40,262 of 40,283 ZIP codes nationally. Within CO, it ranks 619 of 624.
Learn more
the methodology explains exactly which NOAA and USDA figures feed 80478's numbers, and zone vs. frost date explains why Zone 5b and Granby's frost date answer different questions.