Frost dates for 95391 — Tracy, CA
Frost is light and occasional here — typically a few cold nights around midwinter (about 10 a year). Cover tender plants when frost is forecast.
How Tracy compares
- In a typical year, frost nights in Tracy fall between December 10 and January 19. In 1 year in 10 the first frost comes as early as November 26, or the last frost as late as February 17.
- Nearby Livermore, CA, 21 km away, has a regular frost season (last frost Feb 15), a reminder of how much elevation and distance from the coast matter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 25 |
| 50% (median) | January 19 |
| 10% (safe for tender plants) | February 17 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 26 |
| 50% (median) | December 10 |
| 90% (late) | January 7 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Gardening where frost is rare
Tracy, CA only freezes on a few winter nights, so the usual "plant after the last frost" rule doesn't apply. Heat and rainfall decide the seasons instead:
- Cool-season crops (lettuce, broccoli, peas, carrots) grow best from fall through late winter.
- Warm-season crops (tomatoes, peppers, beans, squash) do best planted in late winter to spring, and again in late summer for a fall crop — midsummer heat can stop tomatoes setting fruit.
- Heat lovers (okra, sweet potatoes, melons) can be planted through spring and early summer.
About these dates
Based on 1991–2020 NOAA climate normals for the Tracy Pumping Plt, CA weather station, 5 km away (elevation 62 ft (19 m)).
ZIP codes in Tracy: 95304 95376 95377 95378 95391
Frost dates near Tracy
- Byron Jan 19 · Dec 10
- Discovery Bay Jan 19 · Dec 10
- Livermore Feb 15 · Dec 2
- Holt Feb 5 · Dec 8
- Brentwood Jan 12 · Dec 19
- Lathrop Feb 6 · Dec 1
- Knightsen Jan 12 · Dec 19
- French Camp Feb 6 · Dec 1
Frequently asked questions
When is the last frost in Tracy, CA?
The median last spring frost in Tracy, CA is January 19. There is still about a 10% chance of frost after February 17, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Tracy, CA?
The median first fall frost is December 10, with about a 10% chance of frost before November 26.
How long is the growing season in Tracy, CA?
About 325 days between the median last spring frost and first fall frost.
What planting zone is Tracy, CA?
Tracy, CA is in USDA hardiness zone 9b.