Frost dates for Wasco, CA
At Wasco, the median last spring frost (32°F) is Jan 31 and the median first fall frost is Dec 5, for a typical growing season of 315 days. For a 90% chance that the last frost has passed, wait until Feb 27. Nearby ZIP codes are in USDA hardiness zone 9a.
- Jan 31Last spring frost (median)50% chance of 32°F after this date
- Feb 27Safer planting date10% chance of 32°F after this date
- Dec 5First fall frost (median)50% chance of 32°F by this date
- 315 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 | Jan 30 | Feb 26 | Mar 25 |
| 32°F | Jan 2 | Jan 31 | Feb 27 |
| 28°F | Dec 8 | Jan 4 | Feb 4 |
| 24°F | Dec 8 | Dec 29 | Jan 17 |
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 | Nov 9 | Nov 24 | Dec 10 |
| 32°F | Nov 21 | Dec 5 | Jan 2 |
| 28°F | Nov 29 | Dec 16 | Jan 16 |
| 24°F | Dec 4 | Dec 23 | Jan 14 |
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 | 241 days | 271 days | 302 days |
| 32°F | 278 days | 315 days | 344 days |
| 28°F | 324 days | 352 days | 365 days |
| 24°F | 355 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 97% |
| 28°F | 65% |
| 24°F | 17% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 93280 | 9a | 20 to 25°F | 11 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 USC00049452, at 35.5892, -119.3519, elevation 89 m (291 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 25.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Delano (22 km)
- Shafter 6e (22 km)
- Buttonwillow (23 km)
- Bakersfield Airport (32 km)
- Bakersfield 5 NW (33 km)
- Taft (49 km)
- Corcoran Irrig Dist (60 km)
- Glennville (61 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.