Frost dates for 78599 — Weslaco, TX
Frost is light and occasional here — typically a few cold nights around midwinter (about 1 a year). Cover tender plants when frost is forecast.
How Weslaco compares
- In a typical year, frost nights in Weslaco fall between December 31 and January 8. In 1 year in 10 the first frost comes as early as December 3, or the last frost as late as February 18.
- Compared with Pharr, TX, 20 km away, the last frost here is 1 day earlier than there.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | December 8 |
| 50% (median) | January 8 |
| 10% (safe for tender plants) | February 18 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | December 3 |
| 50% (median) | December 31 |
| 90% (late) | February 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
Weslaco, 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 Weslaco, TX weather station, 3 km away (elevation 75 ft (23 m)).
ZIP codes in Weslaco: 78596 78599
Frost dates near Weslaco
- Donna Jan 8 · Dec 31
- Mercedes Jan 8 · Dec 31
- Progreso Jan 8 · Dec 31
- Alamo Jan 8 · Jan 2
- Elsa Jan 10 · Dec 27
- La Blanca Jan 8 · Jan 2
- La Feria Jan 10 · Dec 27
- Santa Maria Jan 8 · Dec 31
Frequently asked questions
When is the last frost in Weslaco, TX?
The median last spring frost in Weslaco, TX is January 8. There is still about a 10% chance of frost after February 18, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Weslaco, TX?
The median first fall frost is December 31, with about a 10% chance of frost before December 3.
How long is the growing season in Weslaco, TX?
About 357 days between the median last spring frost and first fall frost.
What planting zone is Weslaco, TX?
Weslaco, TX is in USDA hardiness zone 10a.