Frost Dates for 93004 — Ventura, California

At Oxnard WFO, CA, 5 miles south of Ventura, 6% of the winters of 1991–2020 had at least one night at or below 32°F, and none reached 28°F. Nights of 36°F, enough for frost on exposed leaves, are more common (72% of winters) and, when they come, fall between about December 27 and January 20. January is the month most likely to bring one: a 3% chance in a given year. 62 of the 283 other California stations behind this site's ZIP pages freeze in fewer than half of winters too.

August is the warmest month at Oxnard WFO, CA, averaging 79°F by day and 59°F at night; December is the coldest at 68°F and 45°F. Every month stays under a 10% chance of a 32°F night; January is the likeliest at 3%.

Warmth for growing adds up to 4,600 growing degree days a year (base 50°F), more than at 51% of the 283 California stations. 40% of them (1,841) have built up by the end of June, and August adds the most, 592. Precipitation totals 14.6 inches a year, most in January (3.8") and least in June (0.0"); May to September bring 3% of it.

The nearest other station, Oxnard, CA, 6 miles south of Ventura, has a 32°F night in 1% of winters against 6% here, and a coolest-month low 1°F warmer (46°F).

Measurable snow is rare here: only 0 of 15 winters from 1991 to 2020 recorded 0.1 inch or more at Ventura, CA, 7.1 miles away, so there is no typical first-snow date to plan around.

ZIP 93004 is 5 miles from Oxnard WFO, CA, which stands at 52 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 93004 in zone 10a, the band where the coldest night of the year averaged 30 to 35°F (-1.1 to 1.7°C) over 1991–2020; a zone describes winter lows, not frost dates.