How many chill hours does 21641 get?

21641 averages 1538 chill hours per winter, ranging from 1167 to 1780 across the last 10 years.

What hardiness zone is 21641?

21641 is in USDA hardiness zone 7b.

Location almanac

The short answer

21641 averages 1,538 chill hours per winter (1,167–1,780 across 10 years) in USDA zone 7b.

21641 climate
Average chill hours	1,538 (1,167–1,780 across 10 winters)
USDA hardiness zone	7b
Last spring frost	typically March 20 – April 3
First fall frost	typically November 11 – December 9

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 21641’s chill hours and zone:

Chill and zone requirements are comfortably met in 21641.

Show 131 more good fit varieties

How many chill hours does 21641 get?: 21641 averages 1538 chill hours per winter, ranging from 1167 to 1780 across the last 10 years.
What hardiness zone is 21641?: 21641 is in USDA hardiness zone 7b.

Growing fruit trees in 21641? 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