How many chill hours does 31546 get?

31546 averages 507 chill hours per winter, ranging from 253 to 639 across the last 10 years.

What hardiness zone is 31546?

31546 is in USDA hardiness zone 9a.

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The short answer

31546 averages 507 chill hours per winter (253–639 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 31546’s chill hours and zone:

Chill and zone requirements are comfortably met in 31546.

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

How many chill hours does 31546 get?: 31546 averages 507 chill hours per winter, ranging from 253 to 639 across the last 10 years.
What hardiness zone is 31546?: 31546 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