San Diego, TX frost dates
Frost is light and occasional here — typically a few cold nights around midwinter (about 4 a year). Cover tender plants when frost is forecast.
How San Diego compares
- In a typical year, frost nights in San Diego fall between December 29 and January 29. In 1 year in 10 the first frost comes as early as November 25, or the last frost as late as March 5.
- Compared with Corpus Christi, TX, 80 km away, the last frost here is 14 days later than there.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 17 |
| 50% (median) | January 29 |
| 10% (safe for tender plants) | March 5 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 25 |
| 50% (median) | December 29 |
| 90% (late) | February 9 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for San Diego, TX
San Diego, TX frost dates — last frost Jan 29, first frost Dec 29, zone 9b. whenisthelastfrost.com
In mild climates, summer heat limits many crops as much as frost does. Use this calendar for spring planting and lean on fall and winter for cool-season crops.
When to plant vegetables in San Diego, TX
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Nov 6 – Nov 20 | Jan 1 – Jan 15 | — | — |
| Peppers | Nov 20 – Dec 4 | Feb 12 – Feb 26 | — | — |
| Eggplant | Nov 20 – Dec 4 | Feb 12 – Feb 26 | — | — |
| Tomatoes | Dec 4 – Dec 18 | Feb 5 – Feb 19 | — | — |
| Lettuce | Dec 4 – Dec 18 | Jan 8 – Jan 22 | Jan 1 – Feb 5 | Nov 3 – Dec 1 |
| Kale | Dec 4 – Dec 18 | Jan 1 – Jan 15 | Jan 1 – Jan 15 | Oct 20 – Nov 10 |
| Broccoli | Dec 4 – Dec 18 | Jan 15 – Jan 29 | — | Sep 22 – Oct 13 |
| Cabbage | Dec 4 – Dec 18 | Jan 8 – Jan 22 | — | Sep 22 – Oct 13 |
| Cauliflower | Dec 4 – Dec 18 | Jan 15 – Jan 29 | — | Sep 22 – Oct 13 |
| Okra | Dec 18 – Jan 1 | Feb 19 – Mar 5 | Feb 19 – Mar 5 | — |
| Basil | Dec 18 – Jan 1 | Feb 5 – Feb 19 | — | — |
| Peas | — | — | Dec 18 – Jan 8 | Oct 6 – Oct 27 |
| Spinach | — | — | Dec 18 – Jan 8 | Nov 3 – Nov 24 |
| Radishes | — | — | Dec 25 – Feb 5 | Nov 17 – Dec 8 |
| Cucumbers | Jan 1 – Jan 8 | Feb 12 – Feb 19 | Feb 5 – Feb 19 | Oct 13 – Oct 27 |
| Zucchini & Summer Squash | Jan 1 – Jan 8 | — | Feb 5 – Feb 19 | Oct 20 – Nov 3 |
| Winter Squash & Pumpkins | Jan 1 – Jan 8 | — | Feb 5 – Feb 19 | — |
| Melons & Watermelon | Jan 1 – Jan 8 | Feb 12 – Feb 26 | — | — |
| Carrots | — | — | Jan 8 – Feb 5 | Oct 6 – Oct 20 |
| Beets | — | — | Jan 8 – Feb 5 | Oct 20 – Nov 3 |
| Potatoes | — | — | Jan 8 – Jan 29 | — |
| Swiss Chard | — | — | Jan 15 – Feb 12 | Oct 20 – Nov 3 |
| Cilantro | — | — | Jan 15 – Feb 5 | Nov 3 – Nov 24 |
| Green Beans | — | — | Feb 5 – Feb 26 | Oct 13 – Oct 27 |
| Sweet Corn | — | — | Feb 5 – Feb 19 | — |
| Sweet Potatoes | — | Feb 12 – Mar 5 | — | — |
| Garlic | — | — | — | Dec 15 – Jan 19 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Alice, TX weather station, 18 km away (elevation 200 ft (61 m)).
Frost dates near San Diego
- Alice Jan 29 · Dec 29
- Ben Bolt Jan 29 · Dec 29
- Benavides Feb 20 · Dec 1
- Orange Grove Jan 31 · Dec 23
- Agua Dulce Feb 5 · Dec 10
- Freer Feb 10 · Dec 7
- Concepcion Feb 20 · Dec 1
- Banquete Jan 26 · Dec 24
- Realitos Feb 4 · Dec 12
- Premont Feb 25 · Dec 1
Frequently asked questions
When is the last frost in San Diego, TX?
The median last spring frost in San Diego, TX is January 29. There is still about a 10% chance of frost after March 5, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in San Diego, TX?
The median first fall frost is December 29, with about a 10% chance of frost before November 25.
How long is the growing season in San Diego, TX?
About 334 days between the median last spring frost and first fall frost.
What planting zone is San Diego, TX?
San Diego, TX is in USDA hardiness zone 9b.