Alamo, TX frost dates
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 Alamo compares
- In a typical year, frost nights in Alamo fall between January 2 and January 8. In 1 year in 10 the first frost comes as early as December 11, or the last frost as late as February 21.
- Compared with Pharr, TX, 7 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 8 |
| 10% (safe for tender plants) | February 21 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | December 11 |
| 50% (median) | January 2 |
| 90% (late) | February 6 |
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
Alamo, 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 Edinburg, TX weather station, 13 km away (elevation 95 ft (29 m)).
Frost dates near Alamo
- San Juan Jan 9 · Jan 1
- Donna Jan 8 · Dec 31
- Pharr Jan 9 · Jan 1
- Mcallen Jan 9 · Jan 1
- Weslaco Jan 8 · Dec 31
- La Blanca Jan 8 · Jan 2
- Hidalgo Jan 9 · Jan 3
- Elsa Jan 10 · Dec 27
- Progreso Jan 8 · Dec 31
- Mercedes Jan 8 · Dec 31
Frequently asked questions
When is the last frost in Alamo, TX?
The median last spring frost in Alamo, TX is January 8. There is still about a 10% chance of frost after February 21, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Alamo, TX?
The median first fall frost is January 2, with about a 10% chance of frost before December 11.
How long is the growing season in Alamo, TX?
About 359 days between the median last spring frost and first fall frost.
What planting zone is Alamo, TX?
Alamo, TX is in USDA hardiness zone 10a.