Frost dates for ZIP 78380 (Robstown, TX)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Robstown, TX (5 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 82% of years (about 4 freezing night(s) a year on average). The dates below describe freeze timing for the station's record; in many years there may be no 32°F freeze at all.
- Average last spring frostJan 2650% chance of a 32°F freeze after this date
- Average first fall frostDec 2450% chance of a 32°F freeze by this date
- Growing season (frost-free)336 daysmedian, 32°F threshold
- USDA hardiness zone9b25 to 30°F avg. coldest night
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Dec 18 (prior Dec) |
| 50% (the "average" last frost) | Jan 26 |
| 10% (safe-side: only 1 year in 10 freezes later) | Mar 3 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Nov 28 |
| 50% (the "average" first frost) | Dec 24 |
| 90% (late: most years have frozen by now) | Feb 2 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Feb 15 | Dec 8 |
| 32°F (freeze) | Jan 26 | Dec 24 |
| 28°F (hard freeze) | Jan 10 | Jan 2 (next year) |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
This week in Robstown
Soil temperature now
2-inch depth
76°F 55°F or warmer
24-hour average · latest 78°F, as of Oct 17, 8:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Kingsville (18 mi), RB Farms Inc (25 mi), Los Machos Farm (32 mi).
4-inch depth
77°F 55°F or warmer
24-hour average · latest 78°F, as of Oct 17, 8:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Kingsville (18 mi), RB Farms Inc (25 mi), Los Machos Farm (32 mi).
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
No frost in the 7-day forecast.
| Period | High | Low | Forecast |
|---|---|---|---|
| Tonight | 51° | Mostly Clear | |
| Sunday | 77° | 60° | Mostly Sunny |
| Monday | 81° | 64° | Partly Sunny |
| Tuesday | 85° | 67° | Mostly Sunny |
| Wednesday | 86° | 65° | Mostly Sunny |
| Thursday | 88° | 64° | Sunny |
| Friday | 89° | 68° | Sunny |
National Weather Service forecast, issued Oct 17, 8:28 PM CDT. Frost can form above 32°F on clear, calm nights. Full NWS forecast.
Free frost alerts for 78380
An email when the National Weather Service forecasts a freeze for this ZIP, plus the spring soil-temperature heads-up. At most a few a month.
Alerts open soon. This form is a preview and doesn't send anything yet.
Where these numbers come from
Station: Robstown, TX (NOAA GHCN-Daily ID USC00417677), elevation 85 ft, 5.0 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Bishop, TX | 14 mi | Feb 13 | Dec 7 |
| Corpus Christi, TX | 14 mi | Jan 28 | Dec 21 |
| Corpus Christi NWS, TX | 14 mi | Jan 31 | Dec 22 |
The average last-frost dates of these stations span 18 days, a rough guide to local variation. See data sources & methods.
Questions
When is the last frost in 78380?
The average (50% chance) last spring freeze of 32°F for ZIP 78380 is January 26. For a safer planting date, use March 3, when only 1 year in 10 still sees a later freeze.
When is the first frost in 78380?
The average first fall freeze is December 24. In 1 year in 10 it comes by November 28.
What hardiness zone is 78380?
ZIP 78380 is in USDA zone 9b (25 to 30°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
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