How many chill hours does 31738 get?

31738 averages 503 chill hours per winter, ranging from 255 to 632 across the last 10 years.

What hardiness zone is 31738?

31738 is in USDA hardiness zone 9a.

Location almanac

The short answer

31738 averages 503 chill hours per winter (255–632 across 10 years) in USDA zone 9a.

31738 climate
Average chill hours	503 (255–632 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 15 – March 6
First fall frost	typically November 28 – December 23

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 31738’s chill hours and zone:

Chill and zone requirements are comfortably met in 31738.

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 31738 get?: 31738 averages 503 chill hours per winter, ranging from 255 to 632 across the last 10 years.
What hardiness zone is 31738?: 31738 is in USDA hardiness zone 9a.

Growing fruit trees in 31738? Get a care calendar anchored to this exact climate, with email reminders.

[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