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Chill hours in 92548

The short answer

92548 averages 752 chill hours per winter (4281,162 across 10 years) in USDA zone 9b.
92548 climate
Average chill hours752 (428–1,162 across 10 winters)
USDA hardiness zone9b
Last spring frosttypically January 8 – February 25
First fall frosttypically November 30 – December 28

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 92548’s chill hours and zone:

Marginal (13)

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

Marginal varieties for this location
VarietyFruit
GoldcotApricot
HarkoNectarine
MericrestNectarine
CresthavenPeach
RedhavenPeach
D'AnjouPear
Harrow DelightPear
Blue DamsonPlum
French Improved PrunePlum
Italian PrunePlum
StanleyPlum
SunburstSweet Cherry
MeteorTart Cherry
How many chill hours does 92548 get?
92548 averages 752 chill hours per winter, ranging from 428 to 1162 across the last 10 years.
What hardiness zone is 92548?
92548 is in USDA hardiness zone 9b.

Growing fruit trees in 92548? 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