How many chill hours does 31561 get?

31561 averages 252 chill hours per winter, ranging from 98 to 444 across the last 10 years.

What hardiness zone is 31561?

31561 is in USDA hardiness zone 9a.

Location almanac

The short answer

31561 averages 252 chill hours per winter (98–444 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 31561’s chill hours and zone:

Chill and zone requirements are comfortably met in 31561.

Show 13 more good fit varieties

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

How many chill hours does 31561 get?: 31561 averages 252 chill hours per winter, ranging from 98 to 444 across the last 10 years.
What hardiness zone is 31561?: 31561 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