Frost dates for Ojai, CA
At Ojai, the median last spring frost (32°F) is Mar 21 and the median first fall frost is Nov 15, for a typical growing season of 235 days. For a 90% chance that the last frost has passed, wait until Apr 15. Nearby ZIP codes are in USDA hardiness zones 8b to 10a.
- Mar 21Last spring frost (median)50% chance of 32°F after this date
- Apr 15Safer planting date10% chance of 32°F after this date
- Nov 15First fall frost (median)50% chance of 32°F by this date
- 235 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 31 | Apr 19 | May 12 |
| 32°F | Feb 20 | Mar 21 | Apr 15 |
| 28°F | Jan 8 | Feb 17 | Mar 15 |
| 24°F | Dec 12 | Jan 11 | Feb 19 |
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 14 | Oct 31 | Nov 15 |
| 32°F | Oct 28 | Nov 15 | Dec 2 |
| 28°F | Nov 12 | Dec 1 | Dec 22 |
| 24°F | Nov 28 | Dec 17 | Jan 22 |
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 | 165 days | 192 days | 217 days |
| 32°F | 206 days | 235 days | 270 days |
| 28°F | 249 days | 287 days | 329 days |
| 24°F | 307 days | 343 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 99% |
| 24°F | 76% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 93023 | 8b | 15 to 20°F | 7 km |
| 93022 | 9b | 25 to 30°F | 8 km |
| 93060 | 10a | 30 to 35°F | 15 km |
| 93001 | 10a | 30 to 35°F | 15 km |
| 93040 | 8b | 15 to 20°F | 26 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 USC00046399, at 34.4478, -119.2275, elevation 227 m (745 ft).
- Data quality: Representative (10+ years), 22 years of freeze data.
- Average days per year at or below 32°F: 31.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Oxnard Ventura Co Airport (28 km)
- Oxnard WFO (28 km)
- Oxnard (28 km)
- Camarillo Airport (29 km)
- Point Mugu Nf (38 km)
- Santa Barbara (42 km)
- Gibraltar Dam #2 (42 km)
- Santa Barbara Muni Airport (56 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.