Frost dates for ZIP 79742 (Grandfalls, 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, Grandfalls 3SSE, TX (4 miles away).
- Average last spring frostApr 250% chance of a 32°F freeze after this date
- Average first fall frostNov 350% chance of a 32°F freeze by this date
- Growing season (frost-free)214 daysmedian, 32°F threshold
- USDA hardiness zone8a10 to 15°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) | Mar 11 |
| 50% (the "average" last frost) | Apr 2 |
| 10% (safe-side: only 1 year in 10 freezes later) | Apr 19 |
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) | Oct 22 |
| 50% (the "average" first frost) | Nov 3 |
| 90% (late: most years have frozen by now) | Nov 17 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 12 | Oct 26 |
| 32°F (freeze) | Apr 2 | Nov 3 |
| 28°F (hard freeze) | Mar 18 | Nov 12 |
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 Grandfalls
Soil temperature now
2-inch depth
64°F 55°F or warmer
24-hour average · latest 69°F, as of Oct 17, 7:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Monahans 6 ENE (18 mi), Pecos County Line (29 mi), Edwards Stations (31 mi).
4-inch depth
66°F 55°F or warmer
24-hour average · latest 69°F, as of Oct 17, 7:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Monahans 6 ENE (18 mi), Pecos County Line (29 mi), Edwards Stations (31 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 | 41° | Mostly Clear | |
| Sunday | 71° | 49° | Sunny |
| Monday | 79° | 56° | Sunny |
| Tuesday | 82° | 60° | Sunny |
| Wednesday | 84° | 62° | Mostly Sunny |
| Thursday | 85° | 64° | Mostly Sunny |
| Friday | 86° | 65° | Partly Sunny then Slight Chance Showers And Thunderstorms |
National Weather Service forecast, issued Oct 17, 8:29 PM CDT. Frost can form above 32°F on clear, calm nights. Full NWS forecast.
Free frost alerts for 79742
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: Grandfalls 3SSE, TX (NOAA GHCN-Daily ID USC00413680), elevation 2,425 ft, 4.3 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Monahans, TX | 13 mi | Apr 3 | Nov 6 |
| Monahans 6 ENE, TX | 18 mi | Mar 17 | Nov 12 |
| Crane, TX | 29 mi | Mar 16 | Nov 16 |
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 79742?
The average (50% chance) last spring freeze of 32°F for ZIP 79742 is April 2. For a safer planting date, use April 19, when only 1 year in 10 still sees a later freeze.
When is the first frost in 79742?
The average first fall freeze is November 3. In 1 year in 10 it comes by October 22.
What hardiness zone is 79742?
ZIP 79742 is in USDA zone 8a (10 to 15°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.