Frost dates for Stockton Metro Airport, CA
At Stockton Metro Airport, the median last spring frost (32°F) is Feb 6 and the median first fall frost is Dec 1, for a typical growing season of 304 days. For a 90% chance that the last frost has passed, wait until Feb 28. Nearby ZIP codes are in USDA hardiness zone 9b.
- Feb 6Last spring frost (median)50% chance of 32°F after this date
- Feb 28Safer planting date10% chance of 32°F after this date
- Dec 1First fall frost (median)50% chance of 32°F by this date
- 304 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 11 | Mar 10 | Apr 7 |
| 32°F | Dec 31 | Feb 6 | Feb 28 |
| 28°F | Dec 14 | Jan 10 | Feb 5 |
| 24°F | Dec 12 | Jan 1 | Jan 20 |
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 4 | Nov 18 | Dec 2 |
| 32°F | Nov 15 | Dec 1 | Dec 26 |
| 28°F | Nov 29 | Dec 16 | Jan 14 |
| 24°F | Dec 6 | Dec 27 | Jan 15 |
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 | 253 days | 285 days |
| 32°F | 271 days | 304 days | 339 days |
| 28°F | 315 days | 346 days | 365 days |
| 24°F | 347 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 99% |
| 28°F | 77% |
| 24°F | 30% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 95231 | 9b | 25 to 30°F | 6 km |
| 95336 | 9b | 25 to 30°F | 7 km |
| 95215 | 9b | 25 to 30°F | 9 km |
| 95330 | 9b | 25 to 30°F | 12 km |
| 95366 | 9b | 25 to 30°F | 17 km |
| 95320 | 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 USW00023237, at 37.8892, -121.2258, elevation 8 m (26 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 19.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Stockton Fire Station 4 (15 km)
- Lodi (25 km)
- Tracy Carbona (25 km)
- Tracy Pumping Plant (33 km)
- Modesto City Co Airport (38 km)
- Antioch Pumping Plant #3 (47 km)
- Camp Pardee (52 km)
- Turlock #2 (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.