How many chill hours does 31302 get?

31302 averages 540 chill hours per winter, ranging from 327 to 661 across the last 10 years.

What hardiness zone is 31302?

31302 is in USDA hardiness zone 9a.

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The short answer

31302 averages 540 chill hours per winter (327–661 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 31302’s chill hours and zone:

Chill and zone requirements are comfortably met in 31302.

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

How many chill hours does 31302 get?: 31302 averages 540 chill hours per winter, ranging from 327 to 661 across the last 10 years.
What hardiness zone is 31302?: 31302 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