How many chill hours does 38221 get?

38221 averages 1257 chill hours per winter, ranging from 1052 to 1541 across the last 10 years.

What hardiness zone is 38221?

38221 is in USDA hardiness zone 7b.

Location almanac

The short answer

38221 averages 1,257 chill hours per winter (1,052–1,541 across 10 years) in USDA zone 7b.

38221 climate
Average chill hours	1,257 (1,052–1,541 across 10 winters)
USDA hardiness zone	7b
Last spring frost	typically March 1 – April 1
First fall frost	typically November 10 – December 2

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 38221’s chill hours and zone:

Chill and zone requirements are comfortably met in 38221.

Show 131 more good fit varieties

How many chill hours does 38221 get?: 38221 averages 1257 chill hours per winter, ranging from 1052 to 1541 across the last 10 years.
What hardiness zone is 38221?: 38221 is in USDA hardiness zone 7b.

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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