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Chill hours in 78616

The short answer

78616 averages 483 chill hours per winter (238649 across 10 years) in USDA zone 9a.
78616 climate
Average chill hours483 (238–649 across 10 winters)
USDA hardiness zone9a
Last spring frosttypically January 20 – March 6

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 78616’s chill hours and zone:

Marginal (18)

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

Marginal varieties for this location
VarietyFruit
MutsuApple
MoorparkApricot
Puget GoldApricot
TiltonApricot
TomcotApricot
FantasiaNectarine
JunegoldPeach
SuncrestPeach
BartlettPear
BoscPear
ComicePear
WarrenPear
Elephant HeartPlum
BrooksSweet Cherry
Craig's CrimsonSweet Cherry
LapinsSweet Cherry
Royal RainierSweet Cherry
English MorelloTart Cherry
How many chill hours does 78616 get?
78616 averages 483 chill hours per winter, ranging from 238 to 649 across the last 10 years.
What hardiness zone is 78616?
78616 is in USDA hardiness zone 9a.

Growing fruit trees in 78616? 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