Frost dates for ZIP 75051 (Grand Prairie, 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, Arlington Six Flags, TX (5 miles away).

Average last spring frostMar 950% chance of a 32°F freeze after this date
Average first fall frostNov 2050% chance of a 32°F freeze by this date
Growing season (frost-free)253 daysmedian, 32°F threshold
USDA hardiness zone8b15 to 20°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)	Feb 19
50% (the "average" last frost)	Mar 9
10% (safe-side: only 1 year in 10 freezes later)	Apr 2

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 31
50% (the "average" first frost)	Nov 20
90% (late: most years have frozen by now)	Dec 10

Light frost, freeze and hard freeze

Threshold	Last spring (50%)	First fall (50%)
36°F (light frost possible on clear, calm nights)	Mar 25	Nov 8
32°F (freeze)	Mar 9	Nov 20
28°F (hard freeze)	Feb 26	Dec 3

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 Grand Prairie

Soil temperature now

2-inch depth

67°F 55°F or warmer
24-hour average · latest 70°F, as of Oct 17, 7:00 PM CDT

Estimate Not a measurement at this ZIP: distance-weighted average of City of Alvarado (26 mi), Upper Trinity Groundwater Conservation District (45 mi), Blum ISD Farm (49 mi).

4-inch depth

70°F 55°F or warmer
24-hour average · latest 72°F, as of Oct 17, 7:00 PM CDT

Estimate Not a measurement at this ZIP: distance-weighted average of City of Alvarado (26 mi), Mustang Special (40 mi), Upper Trinity Groundwater Conservation District (45 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		47°	Mostly Clear
Sunday	72°	50°	Sunny
Monday	78°	56°	Sunny
Tuesday	82°	58°	Sunny
Wednesday	86°	62°	Sunny
Thursday	88°	64°	Sunny
Friday	88°	66°	Mostly 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.

Where these numbers come from

Station: Arlington Six Flags, TX (NOAA GHCN-Daily ID USC00410337), elevation 536 ft, 5.2 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).

Nearby stations

Station	Distance	Last frost (50%)	First frost (50%)
Joe Pool Lake, TX	6 mi	Mar 20	Nov 13
Arlington Muni AP, TX	7 mi	Mar 9	Nov 21
Dallas Redbird AP, TX	8 mi	Mar 6	Nov 25

The average last-frost dates of these stations span 14 days, a rough guide to local variation. See data sources & methods.

Questions

When is the last frost in 75051?

The average (50% chance) last spring freeze of 32°F for ZIP 75051 is March 9. For a safer planting date, use April 2, when only 1 year in 10 still sees a later freeze.

When is the first frost in 75051?

The average first fall freeze is November 20. In 1 year in 10 it comes by October 31.

What hardiness zone is 75051?

ZIP 75051 is in USDA zone 8b (15 to 20°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.

Other ZIP codes in Dallas County

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