Frost dates for Pearblossom, CA
At Pearblossom, the median last spring frost (32°F) is Mar 13 and the median first fall frost is Dec 1, for a typical growing season of 258 days. For a 90% chance that the last frost has passed, wait until Apr 17. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Mar 13Last spring frost (median)50% chance of 32°F after this date
- Apr 17Safer planting date10% chance of 32°F after this date
- Dec 1First fall frost (median)50% chance of 32°F by this date
- 258 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 14 | Apr 14 | May 9 |
| 32°F | Feb 10 | Mar 13 | Apr 17 |
| 28°F | Dec 30 | Feb 9 | Mar 18 |
| 24°F | Dec 11 | Jan 10 | Feb 18 |
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 28 | Nov 16 | Dec 3 |
| 32°F | Nov 12 | Dec 1 | Dec 18 |
| 28°F | Nov 25 | Dec 12 | Jan 16 |
| 24°F | Dec 5 | Dec 30 | Feb 5 |
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 | 185 days | 216 days | 249 days |
| 32°F | 222 days | 258 days | 297 days |
| 28°F | 265 days | 312 days | 352 days |
| 24°F | 326 days | 363 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 | 52% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 93553 | 8b | 15 to 20°F | 6 km |
| 93543 | 8b | 15 to 20°F | 7 km |
| 93544 | 8b | 15 to 20°F | 13 km |
| 93591 | 8b | 15 to 20°F | 13 km |
| 93550 | 9a | 20 to 25°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 USC00046773, at 34.5025, -117.8969, elevation 945 m (3,101 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 26.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Palmdale (20 km)
- Palmdale Airport (22 km)
- El Mirage (26 km)
- Wrightwood (28 km)
- Mount Wilson Cbs (34 km)
- Lancaster Wm J Fox Field (39 km)
- Pasadena (45 km)
- Pomona/fairplex (48 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.