How many chill hours does 21638 get?

21638 averages 1666 chill hours per winter, ranging from 1268 to 1972 across the last 10 years.

What hardiness zone is 21638?

21638 is in USDA hardiness zone 8a.

Location almanac

The short answer

21638 averages 1,666 chill hours per winter (1,268–1,972 across 10 years) in USDA zone 8a.

21638 climate
Average chill hours	1,666 (1,268–1,972 across 10 winters)
USDA hardiness zone	8a
Last spring frost	typically March 6 – March 29
First fall frost	typically November 11 – December 17

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 21638’s chill hours and zone:

Chill and zone requirements are comfortably met in 21638.

Show 129 more good fit varieties

How many chill hours does 21638 get?: 21638 averages 1666 chill hours per winter, ranging from 1268 to 1972 across the last 10 years.
What hardiness zone is 21638?: 21638 is in USDA hardiness zone 8a.

Growing fruit trees in 21638? 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