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Chill hours in 70780

The short answer

70780 averages 419 chill hours per winter (198552 across 10 years) in USDA zone 9a.
70780 climate
Average chill hours419 (198–552 across 10 winters)
USDA hardiness zone9a
Last spring frosttypically January 18 – March 5

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 70780’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 70780 get?
70780 averages 419 chill hours per winter, ranging from 198 to 552 across the last 10 years.
What hardiness zone is 70780?
70780 is in USDA hardiness zone 9a.

Growing fruit trees in 70780? 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