USDA Hardiness Zone 6a
Frost Dates for 86005 — Flagstaff, Arizona
Updated
No NOAA station with freeze normals is close enough to ZIP 86005 to say when frost comes here.
Where these figures come from
ZIP 86005 has no NOAA station with freeze normals within 100 miles.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.