Frost dates for Oxnard, California
California · first & last freeze, from NOAA 1991–2020 climate normals
Years with any 32°F freeze
1%
1991–2020 normals
Frost-free season
year-round most years
no freeze in a typical year
Oxnard is effectively frost-free: in the 1991–2020 normals, only 1% of years at the Oxnard Ventura Co Ap, CA station ever dip to 32°F, so there is no meaningful "last frost date" — most years never freeze at all.
Freeze-date probabilities, three thresholds
| Threshold | Last spring — 9 in 10 years past by | Last spring — typical (median) | Last spring — 1 in 10 years later than | First fall — 1 in 10 years by | First fall — typical (median) | First fall — 9 in 10 years by |
|---|---|---|---|---|---|---|
| 36°F — near-freezing (frost can occur) | December 28 | January 14 | February 8 | December 23 | January 7 | February 1 |
| 32°F — freezing | reaches this temperature in only 1% of years — too rare for NCEI to compute dates | |||||
| 28°F — hard freeze | reaches this temperature in only 0% of years — too rare for NCEI to compute dates | |||||
Measured at Oxnard Ventura Co Ap, CA (USW00093110), 0.1 mi from the city's census reference point, elev. 36 ft. NOAA/NCEI 1991–2020 normals. Read each date column as odds over the 30-year record — e.g. "9 in 10 years past by" means only one spring in ten saw a later freeze than that date.
Frost-free windows (computed)
In the 1991–2020 normals, only 1% of years at this station ever reach 32°F — most years have no freeze at all, so NCEI computes no freeze dates and no frost-free window is defined. The growing season here is effectively year-round at the freezing threshold.
About this city's numbers
- Census entity: Oxnard city, California — official 2024 population estimate 200,616.
- Weather station: Oxnard Ventura Co Ap, CA (USW00093110), 0.1 mi from the city's census-gazetteer reference point at elevation 36 ft. Frost dates are that station's history — neighborhoods vary.
- Data pulled 2026-09-05; normals period 1991-2020 (replaced by NOAA roughly once a decade).
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