Frost dates for Elsinore, CA
At Elsinore, the median last spring frost (32°F) is Jan 28 and the median first fall frost is Dec 18, for a typical growing season of 329 days. For a 90% chance that the last frost has passed, wait until Feb 27. Nearby ZIP codes are in USDA hardiness zones 9b to 10b.
- Jan 28Last spring frost (median)50% chance of 32°F after this date
- Feb 27Safer planting date10% chance of 32°F after this date
- Dec 18First fall frost (median)50% chance of 32°F by this date
- 329 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 29 | Feb 28 | Apr 2 |
| 32°F | Dec 24 | Jan 28 | Feb 27 |
| 28°F | Dec 12 | Jan 1 | Feb 9 |
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 15 | Dec 2 | Dec 18 |
| 32°F | Dec 1 | Dec 18 | Jan 24 |
| 28°F | Dec 9 | Dec 27 | Feb 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 | 240 days | 274 days | 307 days |
| 32°F | 287 days | 329 days | 361 days |
| 28°F | 339 days | 365 days | 365 days |
| 24°F | 365 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 91% |
| 28°F | 38% |
| 24°F | 2% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 92532 | 9b | 25 to 30°F | 4 km |
| 92530 | 10a | 30 to 35°F | 6 km |
| 92587 | 9b | 25 to 30°F | 9 km |
| 92570 | 9b | 25 to 30°F | 11 km |
| 92595 | 9b | 25 to 30°F | 11 km |
| 92586 | 9b | 25 to 30°F | 14 km |
| 92883 | 10a | 30 to 35°F | 15 km |
| 92584 | 9b | 25 to 30°F | 15 km |
| 92678 | 10b | 35 to 40°F | 15 km |
| 92562 | 10a | 30 to 35°F | 17 km |
| 92585 | 9b | 25 to 30°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 USC00042805, at 33.6861, -117.3458, elevation 386 m (1,268 ft).
- Data quality: Representative (10+ years), 19 years of freeze data.
- Average days per year at or below 32°F: 9.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Riverside Fire Station 3 (30 km)
- Riverside Muni Airport (31 km)
- Fallbrook 5 NE (31 km)
- Riverside Citrus Exp. (31 km)
- Irvine Rch (35 km)
- San Jacinto (36 km)
- Tustin Irvine Rch (38 km)
- Redlands (41 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.