USDA Hardiness Zone 10a
Frost Dates for 93003 — Ventura, California
NOAA 1991–2020 normals from Oxnard Ventura Co Airport, CA (36 ft), 5 miles south.
Updated
Frost is not a yearly event in Ventura: a night at or below 32°F came in 1% of the winters of 1991–2020 at Oxnard Ventura Co Airport, CA, and a 36°F night, cold enough for frost on exposed leaves, in 43%. There is no reliable "last frost date" here; most years have none.
- Winters with a freeze
- 1%
- Winters with 36°F
- 43%
- Coldest month low
- 46°F
- Hardiness zone
- 10a
32°F or below, 1991–2020
frost possible on leaves
average, January
30 to 35°F (-1.1 to 1.7°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 0%
- Snow per year
- 0"
median, 1991–2020
median, 1991–2020
0 of 15 observed
NOAA normal
Frost risk by date in Ventura
At Oxnard Ventura Co Airport, CA, 5 miles south of Ventura, 1% of the winters of 1991–2020 had at least one night at or below 32°F, and none reached 28°F. Even a 36°F night came in only 43% of winters. January is the month most likely to bring one: a 1% 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.
Freeze probabilities 1991–2020 at Oxnard Ventura Co Airport, CA, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 93003 →Compare Ventura with another place →
Weather by month in Ventura
August is the warmest month at Oxnard Ventura Co Airport, CA, averaging 74°F by day and 61°F at night; January is the coldest at 66°F and 46°F. Every month stays under a 10% chance of a 32°F night; January is the likeliest at 1%.
Warmth for growing adds up to 4,122 growing degree days a year (base 50°F), fewer than at 57% of the 283 California stations. 39% of them (1,624) have built up by the end of June, and August adds the most, 529. Precipitation totals 13.0 inches a year, most in February (3.3") and least in July (0.0"); May to September bring 4% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 66 | 46 | 2.9 | 1% | <1 | 193 |
| Feb | 65 | 48 | 3.3 | 0% | 0 | 186 |
| Mar | 66 | 49 | 2.3 | 0% | 0 | 232 |
| Apr | 67 | 51 | 0.7 | 0% | 0 | 257 |
| May | 68 | 54 | 0.3 | 0% | 0 | 346 |
| Jun | 70 | 58 | 0.1 | 0% | 0 | 411 |
| Jul | 73 | 61 | 0.0 | 0% | 0 | 519 |
| Aug | 74 | 61 | 0.0 | 0% | 0 | 529 |
| Sep | 74 | 60 | 0.1 | 0% | 0 | 498 |
| Oct | 74 | 55 | 0.5 | 0% | 0 | 448 |
| Nov | 70 | 50 | 0.7 | 0% | 0 | 302 |
| Dec | 66 | 47 | 2.1 | 0% | <1 | 202 |
Monthly normals 1991–2020 at Oxnard Ventura Co Airport, CA (36 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Oxnard, CA, 6 miles southeast of Ventura, has the same share of winters with a 32°F night, 1%, and the same coolest-month low, 46°F.
When it snows in Ventura, California
Measurable snow is rare here: only 0 of 15 winters from 1991 to 2020 recorded 0.1 inch or more at Ventura, CA, 3.9 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 93003 is 5 miles from Oxnard Ventura Co Airport, CA, which stands at 36 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 93003 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.
Frost dates across California →
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.