How many chill hours does 21770 get?

21770 averages 1636 chill hours per winter, ranging from 1329 to 1876 across the last 10 years.

What hardiness zone is 21770?

21770 is in USDA hardiness zone 7a.

Location almanac

The short answer

21770 averages 1,636 chill hours per winter (1,329–1,876 across 10 years) in USDA zone 7a.

21770 climate
Average chill hours	1,636 (1,329–1,876 across 10 winters)
USDA hardiness zone	7a
Last spring frost	typically March 26 – April 28
First fall frost	typically November 2 – 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 21770’s chill hours and zone:

Chill and zone requirements are comfortably met in 21770.

Show 131 more good fit varieties

How many chill hours does 21770 get?: 21770 averages 1636 chill hours per winter, ranging from 1329 to 1876 across the last 10 years.
What hardiness zone is 21770?: 21770 is in USDA hardiness zone 7a.

Growing fruit trees in 21770? 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