How many chill hours does 21710 get?

21710 averages 1662 chill hours per winter, ranging from 1383 to 1891 across the last 10 years.

What hardiness zone is 21710?

21710 is in USDA hardiness zone 7b.

Location almanac

The short answer

21710 averages 1,662 chill hours per winter (1,383–1,891 across 10 years) in USDA zone 7b.

21710 climate
Average chill hours	1,662 (1,383–1,891 across 10 winters)
USDA hardiness zone	7b
Last spring frost	typically March 27 – April 21
First fall frost	typically November 4 – November 23

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 21710’s chill hours and zone:

Chill and zone requirements are comfortably met in 21710.

Show 131 more good fit varieties

How many chill hours does 21710 get?: 21710 averages 1662 chill hours per winter, ranging from 1383 to 1891 across the last 10 years.
What hardiness zone is 21710?: 21710 is in USDA hardiness zone 7b.

Growing fruit trees in 21710? 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