How many chill hours does 78837 get?

78837 averages 511 chill hours per winter, ranging from 293 to 647 across the last 10 years.

What hardiness zone is 78837?

78837 is in USDA hardiness zone 8b.

Location almanac

The short answer

78837 averages 511 chill hours per winter (293–647 across 10 years) in USDA zone 8b.

78837 climate
Average chill hours	511 (293–647 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically January 10 – March 6
First fall frost	typically December 8 – December 18

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 78837’s chill hours and zone:

Chill and zone requirements are comfortably met in 78837.

Show 71 more good fit varieties

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

How many chill hours does 78837 get?: 78837 averages 511 chill hours per winter, ranging from 293 to 647 across the last 10 years.
What hardiness zone is 78837?: 78837 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