How many chill hours does 31307 get?

31307 averages 569 chill hours per winter, ranging from 347 to 684 across the last 10 years.

What hardiness zone is 31307?

31307 is in USDA hardiness zone 9a.

Location almanac

The short answer

31307 averages 569 chill hours per winter (347–684 across 10 years) in USDA zone 9a.

31307 climate
Average chill hours	569 (347–684 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 22 – March 13
First fall frost	typically November 28 – December 20

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 31307’s chill hours and zone:

Chill and zone requirements are comfortably met in 31307.

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 31307 get?: 31307 averages 569 chill hours per winter, ranging from 347 to 684 across the last 10 years.
What hardiness zone is 31307?: 31307 is in USDA hardiness zone 9a.

Growing fruit trees in 31307? 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