Frost dates · USDA zone 9b
Frost dates for Tracy, CA
Tracy, CA sees its last 32 °F night of spring around January 19 and its first of fall around December 10 — a 330-day freeze-free season in a typical year.
Pick a sauce; the Plan Builder runs this station's dates and hands back the calendar, plant count and gear list.
Freeze odds, by date
| Odds | Last spring freeze after | First fall freeze before |
|---|---|---|
| 9 years in 10 | Dec 25 (prior winter) | Jan 7 (next year) |
| Median — 1 year in 2 | Jan 19 | Dec 10 |
| 1 year in 10 | Feb 17 | Nov 26 |
The top row is the risky edge: in 9 years of 10 a spring freeze still comes after it, so tender transplants set out then need cover. The bottom row is the cautious date — only 1 year in 10 freezes after it — and the one to plan uncovered tender transplants against. Freeze-free season: 330 days median, at least 297 in 9 years of 10, at least 358 days in 1 year of 10. NOAA ranks season length year by year, so it is not the gap between two rows above. A hard freeze (28 °F) has a median last date of Jan 1 and first of Dec 22.
Tracy planting calendar, 2027
Every row runs from the median last frost (Jan 19) and median first frost (Dec 10) above, using each cultivar's days to maturity. Same engine as the Plan Builder.
| Crop | Start indoors | Transplant / plant | First harvest | Days |
|---|---|---|---|---|
| Hardneck GarlicSiberian (porcelain hardneck) | — | Oct 15prior fall | Jun 12 | 240 from sow |
| Spanish OnionYellow Sweet Spanish (long-day) | Oct 27 | Dec 22 | Apr 11 | 110 from transplant |
| Mustard greensGarnet Giant (Brassica juncea) | Direct sow | Jan 19 | Feb 18 | 30 from sow |
| CilantroSlow Bolt (Coriandrum sativum) | Jan 5 | Jan 5 | Feb 19 | 45 from sow |
| Genovese BasilGenovese | Dec 22 | Feb 2 | Apr 3 | 60 from transplant |
| CayenneLong Slim Cayenne (Capsicum annuum) | Nov 24 | Jan 26 | Apr 11 | 75 from transplant |
| HabaneroOrange Habanero (Capsicum chinense) | Nov 10 | Feb 2 | May 8 | 95 from transplant |
| JalapeñoEarly Jalapeño (Capsicum annuum) | Nov 24 | Jan 26 | Apr 11 | 75 from transplant |
| Marconi Red PepperMarconi Red (Capsicum annuum) | Nov 24 | Jan 26 | Apr 16 | 80 from transplant |
| SerranoSerrano Tampiqueño (Capsicum annuum) | Nov 24 | Jan 26 | Apr 16 | 80 from transplant |
| Nantes CarrotScarlet Nantes | Jan 5 | Jan 5 | Mar 16 | 70 from sow |
| TomatilloToma Verde | Dec 8 | Jan 26 | Apr 6 | 70 from transplant |
| Roma TomatoRoma VF (determinate paste) | Dec 8 | Jan 26 | Apr 11 | 75 from transplant |
| San Marzano TomatoSan Marzano (indeterminate paste) | Dec 8 | Jan 26 | Apr 16 | 80 from transplant |
Tight means first harvest lands within two weeks of the median first fall frost: start that crop indoors on time or cover it in fall.
What sauce can Tracy grow?
Each sauce, scheduled for a Tracy container garden: when the first seeds go in and when enough fruit has ripened for one batch.
Tracy frost questions
When is the last frost in Tracy, CA?
The median last 32 °F freeze at TRACY PUMPING PLT, CA is January 19: half of years see a later one. One year in ten, a freeze still comes after February 17; nine years in ten, it comes after December 25 (prior winter). Source: NOAA NCEI 1991–2020 U.S. Climate Normals.
When is the first frost in Tracy, CA?
The median first 32 °F freeze of fall is December 10. One year in ten it arrives before November 26; nine years in ten, before January 7 (next year).
How long is the growing season in Tracy, CA?
330 days between the last spring and first fall 32 °F freeze in a median year. Nine years in ten the season runs at least 297 days; one year in ten, at least 358 days.
What growing zone is Tracy, CA?
USDA hardiness zone 9b, per the 2023 USDA Plant Hardiness Zone Map for ZIP 95376. A zone describes the coldest winter night, not when frost ends, so it is the wrong number for a planting calendar — the frost dates on this page are the right one.
When should I plant tomatoes in Tracy, CA?
Start Roma VF (determinate paste) seeds indoors around Dec 8 and transplant around Jan 26, 1 week after the median last frost. To cut the freeze risk to one year in ten, wait for Feb 17. First ripe fruit lands around Apr 11.
When should I plant peppers in Tracy, CA?
Sow jalapeño indoors on a heat mat around Nov 24; transplant no earlier than Jan 26, and wait past it until nights hold above 50 °F — that can run weeks later. First green pods around Apr 11.
Nearby in California
- Mantecalast frost Feb 6
- Livermorelast frost Feb 15
- Stocktonlast frost Feb 5
- Brentwoodlast frost Jan 12
- Oakleylast frost Jan 12
- Pleasantonlast frost Feb 15
All California frost dates → · How frost-date math drives a sowing calendar →