How many chill hours does 31535 get?

31535 averages 570 chill hours per winter, ranging from 319 to 672 across the last 10 years.

What hardiness zone is 31535?

31535 is in USDA hardiness zone 9a.

Location almanac

The short answer

31535 averages 570 chill hours per winter (319–672 across 10 years) in USDA zone 9a.

31535 climate
Average chill hours	570 (319–672 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 28 – March 15
First fall frost	typically December 3 – 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 31535’s chill hours and zone:

Chill and zone requirements are comfortably met in 31535.

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 31535 get?: 31535 averages 570 chill hours per winter, ranging from 319 to 672 across the last 10 years.
What hardiness zone is 31535?: 31535 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