How many chill hours does 78039 get?

78039 averages 400 chill hours per winter, ranging from 215 to 492 across the last 10 years.

What hardiness zone is 78039?

78039 is in USDA hardiness zone 9a.

Location almanac

The short answer

78039 averages 400 chill hours per winter (215–492 across 10 years) in USDA zone 9a.

78039 climate
Average chill hours	400 (215–492 across 10 winters)
USDA hardiness zone	9a
Last spring frost	typically January 8 – March 5
First fall frost	typically November 12 – December 19

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 78039’s chill hours and zone:

Chill and zone requirements are comfortably met in 78039.

Show 34 more good fit varieties

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

Marginal varieties for this location
Variety	Fruit
Chojuro	Pear
Shinko	Pear

How many chill hours does 78039 get?: 78039 averages 400 chill hours per winter, ranging from 215 to 492 across the last 10 years.
What hardiness zone is 78039?: 78039 is in USDA hardiness zone 9a.

Growing fruit trees in 78039? Get a care calendar anchored to this exact climate, with email reminders.

[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