Last spring frost
Feb 25
Frost Dates for Tracy, CA
First fall frost
Nov 26
Growing season
272 days
Hardiness zone
9b
In an average year around Tracy, CA, the last spring frost (32°F) is about Feb 25 and the first fall frost is about Nov 26, giving roughly a 272-day growing season. To be safe most years, wait until Jan 24 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Apr 23 | Apr 3 | Feb 28 |
| Freeze (32°F) | Apr 6 | Feb 25 | Jan 24 |
| Hard (28°F) | Feb 21 | Jan 18 | Dec 26 |
| Severe (24°F) | Feb 4 | Jan 3 | Dec 16 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 23 | Apr 17 | Apr 12 | Apr 8 | Apr 3 | Mar 31 | Mar 22 | Mar 11 | Feb 28 |
| 32°F | Apr 6 | Mar 28 | Mar 9 | Mar 1 | Feb 25 | Feb 19 | Feb 12 | Feb 5 | Jan 24 |
| 28°F | Feb 21 | Feb 11 | Feb 2 | Jan 27 | Jan 18 | Jan 12 | Jan 6 | Jan 1 | Dec 26 |
| 24°F | Feb 4 | Jan 18 | Jan 11 | Jan 6 | Jan 3 | Dec 31 | Dec 28 | Dec 24 | Dec 16 |
| 20°F | Feb 5 | Jan 21 | Jan 6 | Jan 4 | Dec 31 | Dec 29 | Dec 27 | Dec 21 | Dec 11 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 26 | Nov 12 | Nov 26 |
| Freeze (32°F) | Nov 8 | Nov 26 | Dec 12 |
| Hard (28°F) | Nov 25 | Dec 11 | Jan 4 |
| Severe (24°F) | Dec 5 | Dec 24 | Jan 14 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 26 | Nov 1 | Nov 5 | Nov 9 | Nov 12 | Nov 15 | Nov 18 | Nov 21 | Nov 26 |
| 32°F | Nov 8 | Nov 16 | Nov 20 | Nov 23 | Nov 26 | Nov 29 | Dec 2 | Dec 6 | Dec 12 |
| 28°F | Nov 25 | Dec 1 | Dec 4 | Dec 8 | Dec 11 | Dec 16 | Dec 21 | Dec 27 | Jan 4 |
| 24°F | Dec 5 | Dec 12 | Dec 16 | Dec 21 | Dec 24 | Dec 29 | Jan 1 | Jan 6 | Jan 14 |
| 20°F | Dec 8 | Dec 16 | Dec 24 | Dec 27 | Dec 30 | Jan 2 | Jan 5 | Jan 19 | Feb 3 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Tracy Carbona, Ca, about 1.9 miles away@if(!empty($station['elevation_ft'])), at 135 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Tracy, CA?
On average, the last spring frost (32°F) around Tracy, CA is about Feb 25. In cooler years it can run later, so for a safer bet many gardeners wait until Jan 24.
When is the first frost in the fall?
The first fall frost around Tracy, CA typically arrives about Nov 26. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Feb 25 on average, or Jan 24 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 272 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 95304 Planting calendar → California frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026