Frost dates for Placerville, CA
At Placerville, the median last spring frost (32°F) is Mar 31 and the median first fall frost is Nov 21, for a typical growing season of 237 days. For a 90% chance that the last frost has passed, wait until Apr 23. Nearby ZIP codes are in USDA hardiness zones 9a to 9b.
- Mar 31Last spring frost (median)50% chance of 32°F after this date
- Apr 23Safer planting date10% chance of 32°F after this date
- Nov 21First fall frost (median)50% chance of 32°F by this date
- 237 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 | Apr 6 | Apr 23 | May 14 |
| 32°F | Feb 24 | Mar 31 | Apr 23 |
| 28°F | Jan 14 | Feb 15 | Mar 21 |
| 24°F | Dec 19 | Jan 15 | Feb 21 |
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 17 | Nov 6 | Nov 22 |
| 32°F | Nov 1 | Nov 21 | Dec 7 |
| 28°F | Nov 19 | Dec 5 | Jan 1 |
| 24°F | Dec 1 | Dec 18 | Jan 28 |
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 | 166 days | 196 days | 223 days |
| 32°F | 204 days | 237 days | 275 days |
| 28°F | 254 days | 294 days | 330 days |
| 24°F | 307 days | 342 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 82% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 95619 | 9b | 25 to 30°F | 2 km |
| 95667 | 9b | 25 to 30°F | 5 km |
| 95623 | 9b | 25 to 30°F | 7 km |
| 95709 | 9a | 20 to 25°F | 13 km |
| 95613 | 9b | 25 to 30°F | 14 km |
| 95672 | 9b | 25 to 30°F | 15 km |
| 95682 | 9b | 25 to 30°F | 16 km |
| 95675 | 9a | 20 to 25°F | 18 km |
| 95762 | 9b | 25 to 30°F | 21 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 USC00046960, at 38.6956, -120.8244, elevation 564 m (1,850 ft).
- Data quality: Representative (10+ years), 17 years of freeze data.
- Average days per year at or below 32°F: 30.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Georgetown Ranger Station (26 km)
- Pacific House (29 km)
- Auburn (33 km)
- Sutter Hill Cdf (35 km)
- Colfax (45 km)
- Camp Pardee (50 km)
- Sacramento 5 ESE (54 km)
- Grass Valley #2 (60 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.