Frost dates for Hayfield Pumping Plant, CA
At Hayfield Pumping Plant, the median last spring frost (32°F) is Feb 20 and the median first fall frost is Nov 30, for a typical growing season of 283 days. For a 90% chance that the last frost has passed, wait until Mar 20. Nearby ZIP codes are in USDA hardiness zones 9b to 10a.
- Feb 20Last spring frost (median)50% chance of 32°F after this date
- Mar 20Safer planting date10% chance of 32°F after this date
- Nov 30First fall frost (median)50% chance of 32°F by this date
- 283 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 17 | Mar 11 | Apr 6 |
| 32°F | Jan 19 | Feb 20 | Mar 20 |
| 28°F | Dec 18 | Jan 21 | Feb 25 |
| 24°F | Dec 6 | Jan 5 | Feb 10 |
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 30 | Nov 17 | Dec 3 |
| 32°F | Nov 10 | Nov 30 | Dec 19 |
| 28°F | Nov 22 | Dec 13 | Jan 11 |
| 24°F | Dec 1 | Dec 29 | Jan 30 |
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 | 220 days | 250 days | 279 days |
| 32°F | 250 days | 283 days | 319 days |
| 28°F | 287 days | 329 days | 365 days |
| 24°F | 331 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 92% |
| 24°F | 45% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 92254 | 10a | 30 to 35°F | 39 km |
| 92239 | 10a | 30 to 35°F | 39 km |
| 92236 | 10a | 30 to 35°F | 41 km |
| 92257 | 9b | 25 to 30°F | 42 km |
| 92277 | 9b | 25 to 30°F | 47 km |
| 92274 | 10a | 30 to 35°F | 52 km |
| 92201 | 10a | 30 to 35°F | 56 km |
| 92203 | 10a | 30 to 35°F | 57 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 USC00043855, at 33.7044, -115.6289, elevation 418 m (1,370 ft).
- Data quality: Standard (24+ years of data), 28 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
- Chiriaco Summit (10 km)
- Eagle Mountain (20 km)
- Mecca Fire Station (44 km)
- Desert Resorts Regional Airport (50 km)
- Indio Fire Station (54 km)
- Twentynine Palms (60 km)
- Iron Mountain (68 km)
- Joshua Tree (77 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.