Frost dates for Tracy Carbona, CA
At Tracy Carbona, the median last spring frost (32°F) is Feb 25 and the median first fall frost is Nov 26, for a typical growing season of 272 days. For a 90% chance that the last frost has passed, wait until Apr 6. Nearby ZIP codes are in USDA hardiness zone 9b.
- Feb 25Last spring frost (median)50% chance of 32°F after this date
- Apr 6Safer planting date10% chance of 32°F after this date
- Nov 26First fall frost (median)50% chance of 32°F by this date
- 272 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 28 | Apr 3 | Apr 23 |
| 32°F | Jan 24 | Feb 25 | Apr 6 |
| 28°F | Dec 26 | Jan 18 | Feb 21 |
| 24°F | Dec 16 | Jan 3 | Feb 4 |
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 26 | Nov 12 | Nov 26 |
| 32°F | Nov 8 | Nov 26 | Dec 12 |
| 28°F | Nov 25 | Dec 11 | Jan 4 |
| 24°F | Dec 5 | Dec 24 | Jan 14 |
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 | 193 days | 222 days | 257 days |
| 32°F | 228 days | 272 days | 306 days |
| 28°F | 287 days | 327 days | 354 days |
| 24°F | 333 days | 359 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 95% |
| 24°F | 58% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 95304 | 9b | 25 to 30°F | 3 km |
| 95376 | 9b | 25 to 30°F | 10 km |
| 95337 | 9b | 25 to 30°F | 12 km |
| 95385 | 9b | 25 to 30°F | 12 km |
| 95387 | 9b | 25 to 30°F | 17 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 USC00048999, at 37.6819, -121.3467, elevation 41 m (135 ft).
- Data quality: Estimated from nearby stations (2+ years), 23 years of freeze data.
- Average days per year at or below 32°F: 26.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Tracy Pumping Plant (24 km)
- Stockton Metro Airport (25 km)
- Stockton Fire Station 4 (35 km)
- Modesto City Co Airport (35 km)
- Livermore (41 km)
- Livermore Muni Airport (41 km)
- Mount Hamilton (46 km)
- Lodi (47 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.