How many chill hours does 37203 get?

37203 averages 1217 chill hours per winter, ranging from 1014 to 1522 across the last 10 years.

What hardiness zone is 37203?

37203 is in USDA hardiness zone 7b.

Location almanac

The short answer

37203 averages 1,217 chill hours per winter (1,014–1,522 across 10 years) in USDA zone 7b.

37203 climate
Average chill hours	1,217 (1,014–1,522 across 10 winters)
USDA hardiness zone	7b
Last spring frost	typically March 19 – April 16
First fall frost	typically November 1 – November 22

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 37203’s chill hours and zone:

Chill and zone requirements are comfortably met in 37203.

Show 108 more good fit varieties

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

How many chill hours does 37203 get?: 37203 averages 1217 chill hours per winter, ranging from 1014 to 1522 across the last 10 years.
What hardiness zone is 37203?: 37203 is in USDA hardiness zone 7b.

Growing fruit trees in 37203? Save your first tree free and see this month’s care tasks for this climate.

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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