How many chill hours does 37309 get?

37309 averages 1185 chill hours per winter, ranging from 958 to 1466 across the last 10 years.

What hardiness zone is 37309?

37309 is in USDA hardiness zone 7b.

Location almanac

The short answer

37309 averages 1,185 chill hours per winter (958–1,466 across 10 years) in USDA zone 7b.

37309 climate
Average chill hours	1,185 (958–1,466 across 10 winters)
USDA hardiness zone	7b
Last spring frost	typically March 9 – April 17
First fall frost	typically November 2 – 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 37309’s chill hours and zone:

Chill and zone requirements are comfortably met in 37309.

Show 131 more good fit varieties

How many chill hours does 37309 get?: 37309 averages 1185 chill hours per winter, ranging from 958 to 1466 across the last 10 years.
What hardiness zone is 37309?: 37309 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