How many chill hours does 31630 get?

31630 averages 480 chill hours per winter, ranging from 231 to 628 across the last 10 years.

What hardiness zone is 31630?

31630 is in USDA hardiness zone 9a.

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The short answer

31630 averages 480 chill hours per winter (231–628 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 31630’s chill hours and zone:

Chill and zone requirements are comfortably met in 31630.

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 31630 get?: 31630 averages 480 chill hours per winter, ranging from 231 to 628 across the last 10 years.
What hardiness zone is 31630?: 31630 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