How many chill hours does 20680 get?

20680 averages 1534 chill hours per winter, ranging from 1141 to 1911 across the last 10 years.

What hardiness zone is 20680?

20680 is in USDA hardiness zone 8a.

Location almanac

The short answer

20680 averages 1,534 chill hours per winter (1,141–1,911 across 10 years) in USDA zone 8a.

20680 climate
Average chill hours	1,534 (1,141–1,911 across 10 winters)
USDA hardiness zone	8a
Last spring frost	typically March 1 – March 29
First fall frost	typically November 13 – December 20

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 20680’s chill hours and zone:

Chill and zone requirements are comfortably met in 20680.

Show 129 more good fit varieties

How many chill hours does 20680 get?: 20680 averages 1534 chill hours per winter, ranging from 1141 to 1911 across the last 10 years.
What hardiness zone is 20680?: 20680 is in USDA hardiness zone 8a.

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[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