Frost dates for Delano, CA
At Delano, the median last spring frost (32°F) is Jan 31 and the median first fall frost is Dec 8, for a typical growing season of 309 days. For a 90% chance that the last frost has passed, wait until Mar 5. Nearby ZIP codes are in USDA hardiness zones 9a to 9b.
- Jan 31Last spring frost (median)50% chance of 32°F after this date
- Mar 5Safer planting date10% chance of 32°F after this date
- Dec 8First fall frost (median)50% chance of 32°F by this date
- 309 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 | Feb 6 | Mar 5 | Apr 4 |
| 32°F | Dec 30 | Jan 31 | Mar 5 |
| 28°F | Dec 13 | Dec 31 | Jan 30 |
| 24°F | Dec 14 | Dec 28 | Jan 6 |
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 10 | Nov 24 | Dec 8 |
| 32°F | Nov 23 | Dec 8 | Dec 30 |
| 28°F | Dec 3 | Dec 19 | Jan 9 |
| 24°F | Dec 9 | Dec 24 | Jan 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 | 231 days | 261 days | 294 days |
| 32°F | 273 days | 309 days | 341 days |
| 28°F | 329 days | 354 days | 365 days |
| 24°F | 356 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 98% |
| 28°F | 67% |
| 24°F | 17% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 93215 | 9b | 25 to 30°F | 6 km |
| 93250 | 9b | 25 to 30°F | 12 km |
| 93219 | 9a | 20 to 25°F | 14 km |
| 93261 | 9b | 25 to 30°F | 14 km |
| 93218 | 9b | 25 to 30°F | 22 km |
| 93256 | 9a | 20 to 25°F | 23 km |
| 93201 | 9a | 20 to 25°F | 24 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 USC00042346, at 35.7683, -119.2600, elevation 92 m (302 ft).
- Data quality: Estimated from nearby stations (2+ years), 8 years of freeze data.
- Average days per year at or below 32°F: 18.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Wasco (22 km)
- Shafter 6e (33 km)
- Porterville (40 km)
- Bakersfield Airport (42 km)
- Bakersfield 5 NW (43 km)
- Buttonwillow (45 km)
- Corcoran Irrig Dist (47 km)
- Glennville (51 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.