Frost dates for Stockton Fire Station 4, CA
At Stockton Fire Station 4, the median last spring frost (32°F) is Feb 5 and the median first fall frost is Dec 8, for a typical growing season of 305 days. For a 90% chance that the last frost has passed, wait until Mar 11. Nearby ZIP codes are in USDA hardiness zone 9b.
- Feb 5Last spring frost (median)50% chance of 32°F after this date
- Mar 11Safer planting date10% chance of 32°F after this date
- Dec 8First fall frost (median)50% chance of 32°F by this date
- 305 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 1 | Mar 4 | Apr 13 |
| 32°F | Dec 27 | Feb 5 | Mar 11 |
| 28°F | Dec 12 | Jan 11 | Feb 21 |
| 24°F | Dec 8 | Jan 3 | Jan 29 |
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 3 | Nov 20 | Dec 13 |
| 32°F | Nov 17 | Dec 8 | Jan 6 |
| 28°F | Dec 1 | Dec 23 | Jan 29 |
| 24°F | Dec 7 | Dec 31 | Jan 26 |
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 | 219 days | 260 days | 295 days |
| 32°F | 262 days | 305 days | 344 days |
| 28°F | 310 days | 353 days | 365 days |
| 24°F | 355 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 97% |
| 28°F | 59% |
| 24°F | 13% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 95207 | 9b | 25 to 30°F | 1 km |
| 95204 | 9b | 25 to 30°F | 3 km |
| 95210 | 9b | 25 to 30°F | 4 km |
| 95202 | 9b | 25 to 30°F | 5 km |
| 95203 | 9b | 25 to 30°F | 5 km |
| 95209 | 9b | 25 to 30°F | 6 km |
| 95205 | 9b | 25 to 30°F | 6 km |
| 95206 | 9b | 25 to 30°F | 12 km |
| 95219 | 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 USC00048560, at 37.9994, -121.3178, elevation 4 m (12 ft).
- Data quality: Representative (10+ years), 15 years of freeze data.
- Average days per year at or below 32°F: 25.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lodi (12 km)
- Stockton Metro Airport (15 km)
- Tracy Pumping Plant (32 km)
- Tracy Carbona (35 km)
- Antioch Pumping Plant #3 (38 km)
- Camp Pardee (50 km)
- Modesto City Co Airport (53 km)
- Livermore (55 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.