How many chill hours does 78840 get?

78840 averages 467 chill hours per winter, ranging from 261 to 556 across the last 10 years.

What hardiness zone is 78840?

78840 is in USDA hardiness zone 8b.

Location almanac

The short answer

78840 averages 467 chill hours per winter (261–556 across 10 years) in USDA zone 8b.

78840 climate
Average chill hours	467 (261–556 across 10 winters)
USDA hardiness zone	8b
Last spring frost	typically January 10 – March 6
First fall frost	typically November 12 – December 12

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 78840’s chill hours and zone:

Chill and zone requirements are comfortably met in 78840.

Show 55 more good fit varieties

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

How many chill hours does 78840 get?: 78840 averages 467 chill hours per winter, ranging from 261 to 556 across the last 10 years.
What hardiness zone is 78840?: 78840 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