How many chill hours does 31009 get?

31009 averages 655 chill hours per winter, ranging from 395 to 778 across the last 10 years.

What hardiness zone is 31009?

31009 is in USDA hardiness zone 8b.

Location almanac

The short answer

31009 averages 655 chill hours per winter (395–778 across 10 years) in USDA zone 8b.

31009 climate
Average chill hours	655 (395–778 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically January 31 – March 16
First fall frost	typically November 28 – 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 31009’s chill hours and zone:

Chill and zone requirements are comfortably met in 31009.

Show 79 more good fit varieties

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

How many chill hours does 31009 get?: 31009 averages 655 chill hours per winter, ranging from 395 to 778 across the last 10 years.
What hardiness zone is 31009?: 31009 is in USDA hardiness zone 8b.

Growing fruit trees in 31009? 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