How many chill hours does 31328 get?

31328 averages 308 chill hours per winter, ranging from 160 to 476 across the last 10 years.

What hardiness zone is 31328?

31328 is in USDA hardiness zone 9a.

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The short answer

31328 averages 308 chill hours per winter (160–476 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 31328’s chill hours and zone:

Chill and zone requirements are comfortably met in 31328.

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

How many chill hours does 31328 get?: 31328 averages 308 chill hours per winter, ranging from 160 to 476 across the last 10 years.
What hardiness zone is 31328?: 31328 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