Frost dates for ZIP 78371 (Oilton, 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, Bruni, TX (15 miles away).
- Average last spring frostJan 3050% chance of a 32°F freeze after this date
- Average first fall frostDec 1850% chance of a 32°F freeze by this date
- Growing season (frost-free)323 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 25 (prior Dec) |
| 50% (the "average" last frost) | Jan 30 |
| 10% (safe-side: only 1 year in 10 freezes later) | Mar 1 |
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 22 |
| 50% (the "average" first frost) | Dec 18 |
| 90% (late: most years have frozen by now) | Jan 25 (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 19 | Nov 30 |
| 32°F (freeze) | Jan 30 | Dec 18 |
| 28°F (hard freeze) | Jan 11 | Jan 1 (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 Oilton
Soil temperature now
2-inch depth
74°F 55°F or warmer
24-hour average · latest 77°F, as of Oct 17, 7:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Duval County Park (37 mi), Great Horizon Ranch (44 mi), Gilbert N Saenz (45 mi).
4-inch depth
76°F 55°F or warmer
24-hour average · latest 78°F, as of Oct 17, 7:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Duval County Park (37 mi), Great Horizon Ranch (44 mi), Los Machos Farm (58 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 | 49° | Mostly Clear | |
| Sunday | 76° | 60° | Mostly Sunny |
| Monday | 84° | 66° | Partly Sunny |
| Tuesday | 90° | 67° | Mostly Sunny |
| Wednesday | 91° | 67° | Mostly Sunny then Slight Chance Rain Showers |
| Thursday | 93° | 66° | Sunny |
| Friday | 93° | 69° | 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 78371
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: Bruni, TX (NOAA GHCN-Daily ID USC00411148), elevation 771 ft, 15.4 miles from the ZIP's center point. NOAA completeness flag: E (estimated from nearby stations).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Laredo AFB, TX | 24 mi | Jan 20 | Dec 25 |
| Laredo 2, TX | 26 mi | Jan 25 | Dec 17 |
| Hebbronville, TX | 28 mi | Feb 4 | Dec 12 |
The average last-frost dates of these stations span 15 days, a rough guide to local variation. See data sources & methods.
Questions
When is the last frost in 78371?
The average (50% chance) last spring freeze of 32°F for ZIP 78371 is January 30. For a safer planting date, use March 1, when only 1 year in 10 still sees a later freeze.
When is the first frost in 78371?
The average first fall freeze is December 18. In 1 year in 10 it comes by November 22.
What hardiness zone is 78371?
ZIP 78371 is in USDA zone 9b (25 to 30°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
Other ZIP codes in Webb County
78019 78040 78041 78043 78044 78045 78046 78344 78369 All Webb County ZIPs