How many chill hours does 31564 get?

31564 averages 514 chill hours per winter, ranging from 251 to 642 across the last 10 years.

What hardiness zone is 31564?

31564 is in USDA hardiness zone 9a.

Location almanac

The short answer

31564 averages 514 chill hours per winter (251–642 across 10 years) in USDA zone 9a.

31564 climate
Average chill hours	514 (251–642 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 31 – March 13
First fall frost	typically December 2 – December 31

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 31564’s chill hours and zone:

Chill and zone requirements are comfortably met in 31564.

Show 48 more good fit varieties

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

How many chill hours does 31564 get?: 31564 averages 514 chill hours per winter, ranging from 251 to 642 across the last 10 years.
What hardiness zone is 31564?: 31564 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