How many chill hours does 31704 get?

31704 averages 588 chill hours per winter, ranging from 363 to 685 across the last 10 years.

What hardiness zone is 31704?

31704 is in USDA hardiness zone 9a.

Location almanac

The short answer

31704 averages 588 chill hours per winter (363–685 across 10 years) in USDA zone 9a.

31704 climate
Average chill hours	588 (363–685 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 31 – March 16
First fall frost	typically November 29 – December 11

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 31704’s chill hours and zone:

Chill and zone requirements are comfortably met in 31704.

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 31704 get?: 31704 averages 588 chill hours per winter, ranging from 363 to 685 across the last 10 years.
What hardiness zone is 31704?: 31704 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