Frost dates for Harlingen, TX
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
January 9
typical year
Safe to plant
February 4
frost is over in 9 of 10 years
First fall frost
January 3
typical year
Growing season
365 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | Season usually too short. Try a quick variety or row covers. | ||
| Spinach | – | Nov 28 – Dec 19 | Nov 8 – 22 |
| Lettuce | – | Dec 12 – Jan 2 | Nov 8 – 22 |
| Radishes | – | Dec 12 – Jan 23 | Nov 22 – Dec 6 |
| Onions | – | Dec 12 – 26 | – |
| Potatoes | Season usually too short. Try a quick variety or row covers. | ||
| Carrots | – | Dec 19 – Jan 9 | Oct 11 – 25 |
| Beets | – | Dec 12 – 26 | Oct 25 – Nov 8 |
| Kale | Oct 31 – Nov 14 | Dec 12 – 26 | Oct 25 – Nov 8 |
| Broccoli | Oct 31 – Nov 14 | Dec 26 – Jan 9 | Oct 25 – Nov 8 |
| Cabbage | Oct 17 – 31 | Dec 12 – 26 | Oct 25 – Nov 8 |
| Garlic | – | – | Nov 22 – Dec 13 |
| Warm-season crops | |||
| Tomatoes | Season usually too short. Try a quick variety or row covers. | ||
| Peppers | Season usually too short. Try a quick variety or row covers. | ||
| Cucumbers | Season usually too short. Try a quick variety or row covers. | ||
| Zucchini | Season usually too short. Try a quick variety or row covers. | ||
| Pumpkins | Season usually too short. Try a quick variety or row covers. | ||
| Green beans | Season usually too short. Try a quick variety or row covers. | ||
| Sweet corn | Season usually too short. Try a quick variety or row covers. | ||
| Basil | Season usually too short. Try a quick variety or row covers. | ||
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | February 4 | January 9 | December 15 |
| Fall frost before | December 9 | January 3 | January 29 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around n/a (n/a in a late year), and the first one in fall around n/a.
Towns that use these dates
This is the nearest NOAA station with frost records for 6 towns.
Harlingen, San Benito, Primera, Combes, Palm Valley, Los Indios
Where these dates come from
NOAA weather station HARLINGEN, TX US (USC00413943), 1991–2020 climate normals. It's the nearest station for 4 zip codes, all within 12 miles:
78535, 78552, 78567, 78586
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.