Frost dates for Inyokern, CA
At Inyokern, the median last spring frost (32°F) is Mar 9 and the median first fall frost is Nov 20, for a typical growing season of 250 days. For a 90% chance that the last frost has passed, wait until Apr 8. Nearby ZIP codes are in USDA hardiness zones 8b to 9a.
- Mar 9Last spring frost (median)50% chance of 32°F after this date
- Apr 8Safer planting date10% chance of 32°F after this date
- Nov 20First fall frost (median)50% chance of 32°F by this date
- 250 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 9 | Apr 3 | Apr 26 |
| 32°F | Feb 16 | Mar 9 | Apr 8 |
| 28°F | Jan 21 | Feb 18 | Mar 12 |
| 24°F | Dec 25 | Jan 20 | Feb 25 |
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 24 | Nov 8 | Nov 22 |
| 32°F | Nov 2 | Nov 20 | Dec 5 |
| 28°F | Nov 14 | Dec 1 | Dec 16 |
| 24°F | Nov 24 | Dec 11 | Jan 1 |
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 | 191 days | 217 days | 246 days |
| 32°F | 217 days | 250 days | 279 days |
| 28°F | 256 days | 286 days | 321 days |
| 24°F | 288 days | 327 days | 354 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 96% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 93555 | 8b | 15 to 20°F | 15 km |
| 93255 | 9a | 20 to 25°F | 25 km |
| 93554 | 9a | 20 to 25°F | 32 km |
| 93528 | 9a | 20 to 25°F | 35 km |
| 93527 | 8b | 15 to 20°F | 38 km |
| 93519 | 8b | 15 to 20°F | 40 km |
| 93558 | 9a | 20 to 25°F | 41 km |
| 93283 | 9a | 20 to 25°F | 44 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 USC00044278, at 35.6514, -117.8214, elevation 741 m (2,430 ft).
- Data quality: Representative (10+ years), 13 years of freeze data.
- Average days per year at or below 32°F: 58.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- China Lake Naf (12 km)
- Randsburg (35 km)
- Trona (41 km)
- S Lake Fs (49 km)
- Haiwee (55 km)
- Kern River Ph 3 (58 km)
- Loraine 5 NNE (61 km)
- Mojave (74 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.