Frost dates for Gibraltar Dam #2, CA
At Gibraltar Dam #2, the median last spring frost (32°F) is Mar 20 and the median first fall frost is Nov 27, for a typical growing season of 250 days. For a 90% chance that the last frost has passed, wait until Apr 16. Nearby ZIP codes are in USDA hardiness zones 9b to 10a.
- Mar 20Last spring frost (median)50% chance of 32°F after this date
- Apr 16Safer planting date10% chance of 32°F after this date
- Nov 27First fall frost (median)50% chance of 32°F by this date
- 250 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Mar 26 | Apr 19 | May 13 |
| 32°F | Feb 17 | Mar 20 | Apr 16 |
| 28°F | Dec 28 | Feb 8 | Mar 16 |
| 24°F | Dec 13 | Jan 4 | Feb 14 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Oct 15 | Nov 9 | Nov 25 |
| 32°F | Nov 4 | Nov 27 | Dec 12 |
| 28°F | Nov 24 | Dec 13 | Jan 7 |
| 24°F | Dec 6 | Dec 28 | Feb 3 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 170 days | 201 days | 232 days |
| 32°F | 217 days | 250 days | 283 days |
| 28°F | 268 days | 309 days | 351 days |
| 24°F | 330 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 95% |
| 24°F | 45% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 93105 | 10a | 30 to 35°F | 8 km |
| 93460 | 9b | 25 to 30°F | 18 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00043402, at 34.5225, -119.6822, elevation 475 m (1,558 ft).
- Data quality: Estimated from nearby stations (2+ years), 5 years of freeze data.
- Average days per year at or below 32°F: 39.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Santa Barbara (12 km)
- Santa Barbara Muni Airport (18 km)
- Santa Barbara 11 W (22 km)
- Cachuma Lake (28 km)
- Ojai (42 km)
- New Cuyama Fire Station (47 km)
- Oxnard Ventura Co Airport (56 km)
- Oxnard (59 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.