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Chill hours in 78935

The short answer

78935 averages 428 chill hours per winter (162539 across 10 years) in USDA zone 9a.
78935 climate
Average chill hours428 (162–539 across 10 winters)
USDA hardiness zone9a
Last spring frosttypically January 20 – March 6
First fall frosttypically November 13 – 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 78935’s chill hours and zone:

Marginal (14)

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

Marginal varieties for this location
VarietyFruit
MutsuApple
TomcotApricot
FantasiaNectarine
SuncrestPeach
BartlettPear
BoscPear
ChojuroPear
ShinkoPear
Elephant HeartPlum
BrooksSweet Cherry
Craig's CrimsonSweet Cherry
LapinsSweet Cherry
Royal RainierSweet Cherry
English MorelloTart Cherry
How many chill hours does 78935 get?
78935 averages 428 chill hours per winter, ranging from 162 to 539 across the last 10 years.
What hardiness zone is 78935?
78935 is in USDA hardiness zone 9a.

Growing fruit trees in 78935? Get a care calendar anchored to this exact climate, with email reminders.

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Sources

  1. [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
  2. [2] USDA / PRISM (Oregon State University). 2023 USDA Plant Hardiness Zone Map — accessed July 2026