How many chill hours does 31320 get?

31320 averages 473 chill hours per winter, ranging from 251 to 656 across the last 10 years.

What hardiness zone is 31320?

31320 is in USDA hardiness zone 9a.

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The short answer

31320 averages 473 chill hours per winter (251–656 across 10 years) in USDA zone 9a.

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 31320’s chill hours and zone:

Chill and zone requirements are comfortably met in 31320.

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 31320 get?: 31320 averages 473 chill hours per winter, ranging from 251 to 656 across the last 10 years.
What hardiness zone is 31320?: 31320 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