How many chill hours does 21237 get?

21237 averages 1685 chill hours per winter, ranging from 1348 to 1943 across the last 10 years.

What hardiness zone is 21237?

21237 is in USDA hardiness zone 8a.

Location almanac

The short answer

21237 averages 1,685 chill hours per winter (1,348–1,943 across 10 years) in USDA zone 8a.

21237 climate
Average chill hours	1,685 (1,348–1,943 across 10 winters)
USDA hardiness zone	8a
Last spring frost	typically March 23 – April 11
First fall frost	typically November 11 – November 24

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 21237’s chill hours and zone:

Chill and zone requirements are comfortably met in 21237.

Show 129 more good fit varieties

How many chill hours does 21237 get?: 21237 averages 1685 chill hours per winter, ranging from 1348 to 1943 across the last 10 years.
What hardiness zone is 21237?: 21237 is in USDA hardiness zone 8a.

Growing fruit trees in 21237? 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