How many chill hours does 39840 get?

39840 averages 639 chill hours per winter, ranging from 385 to 730 across the last 10 years.

What hardiness zone is 39840?

39840 is in USDA hardiness zone 8b.

Location almanac

The short answer

39840 averages 639 chill hours per winter (385–730 across 10 years) in USDA zone 8b.

39840 climate
Average chill hours	639 (385–730 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically February 10 – March 16
First fall frost	typically November 18 – December 10

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 39840’s chill hours and zone:

Chill and zone requirements are comfortably met in 39840.

Show 78 more good fit varieties

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

How many chill hours does 39840 get?: 39840 averages 639 chill hours per winter, ranging from 385 to 730 across the last 10 years.
What hardiness zone is 39840?: 39840 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