How many chill hours does 31544 get?

31544 averages 584 chill hours per winter, ranging from 329 to 691 across the last 10 years.

What hardiness zone is 31544?

31544 is in USDA hardiness zone 8b.

Location almanac

The short answer

31544 averages 584 chill hours per winter (329–691 across 10 years) in USDA zone 8b.

31544 climate
Average chill hours	584 (329–691 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically January 28 – March 13
First fall frost	typically November 28 – December 19

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 31544’s chill hours and zone:

Chill and zone requirements are comfortably met in 31544.

Show 71 more good fit varieties

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

How many chill hours does 31544 get?: 31544 averages 584 chill hours per winter, ranging from 329 to 691 across the last 10 years.
What hardiness zone is 31544?: 31544 is in USDA hardiness zone 8b.

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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