How many chill hours does 28577 get?

28577 averages 665 chill hours per winter, ranging from 446 to 962 across the last 10 years.

What hardiness zone is 28577?

28577 is in USDA hardiness zone 8b.

Location almanac

The short answer

28577 averages 665 chill hours per winter (446–962 across 10 years) in USDA zone 8b.

28577 climate
Average chill hours	665 (446–962 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically January 30 – March 13
First fall frost	typically December 5 – December 27

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 28577’s chill hours and zone:

Chill and zone requirements are comfortably met in 28577.

Show 79 more good fit varieties

Possible in a good year or a favorable microclimate — click through for the caveats.

Show 18 more marginal varieties

How many chill hours does 28577 get?: 28577 averages 665 chill hours per winter, ranging from 446 to 962 across the last 10 years.
What hardiness zone is 28577?: 28577 is in USDA hardiness zone 8b.

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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