How many chill hours does 31773 get?

31773 averages 493 chill hours per winter, ranging from 254 to 616 across the last 10 years.

What hardiness zone is 31773?

31773 is in USDA hardiness zone 9a.

Location almanac

The short answer

31773 averages 493 chill hours per winter (254–616 across 10 years) in USDA zone 9a.

31773 climate
Average chill hours	493 (254–616 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 15 – February 22
First fall frost	typically December 3 – December 23

Computed from 10 winters of ERA5 hourly temperature (Open-Meteo, 2015–2025); zones from USDA PHZM 2023. Data updated July 3, 2026. See methodology.

Every variety in our database, checked against 31773’s chill hours and zone:

Chill and zone requirements are comfortably met in 31773.

Show 36 more good fit varieties

Possible in a good year or a favorable microclimate — click through for the caveats.

How many chill hours does 31773 get?: 31773 averages 493 chill hours per winter, ranging from 254 to 616 across the last 10 years.
What hardiness zone is 31773?: 31773 is in USDA hardiness zone 9a.

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[1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
[2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026