San Ygnacio, 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 Ygnacio compares
- In a typical year, frost nights in San Ygnacio fall between December 22 and January 19. In 1 year in 10 the first frost comes as early as November 28, or the last frost as late as February 25.
- Compared with Laredo, TX, 52 km away, the last frost here is 1 day earlier than there.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 17 |
| 50% (median) | January 19 |
| 10% (safe for tender plants) | February 25 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | November 28 |
| 50% (median) | December 22 |
| 90% (late) | January 27 |
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
San Ygnacio, TX 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 Zapata 1 S, TX weather station, 27 km away (elevation 322 ft (98 m)).
Frost dates near San Ygnacio
- Zapata Jan 19 · Dec 22
- Lopeno Jan 9 · Jan 1
- Laredo Jan 20 · Dec 25
- Guerra Jan 19 · Dec 22
- Falcon Heights Jan 9 · Jan 1
- Mirando City Jan 30 · Dec 18
- Laredo (Webb) Jan 20 · Dec 25
- Oilton Jan 30 · Dec 18
- Salineno Jan 9 · Jan 1
- Bruni Jan 30 · Dec 18
Frequently asked questions
When is the last frost in San Ygnacio, TX?
The median last spring frost in San Ygnacio, TX is January 19. There is still about a 10% chance of frost after February 25, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in San Ygnacio, TX?
The median first fall frost is December 22, with about a 10% chance of frost before November 28.
How long is the growing season in San Ygnacio, TX?
About 337 days between the median last spring frost and first fall frost.
What planting zone is San Ygnacio, TX?
San Ygnacio, TX is in USDA hardiness zone 9b.