Frost dates for ZIP 75088 (Rowlett, 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, Lavon Dam, TX (10 miles away).

Average last spring frostMar 1050% chance of a 32°F freeze after this date
Average first fall frostNov 1950% chance of a 32°F freeze by this date
Growing season (frost-free)254 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 20
50% (the "average" last frost)	Mar 10
10% (safe-side: only 1 year in 10 freezes later)	Mar 31

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 1
50% (the "average" first frost)	Nov 19
90% (late: most years have frozen by now)	Dec 5

Light frost, freeze and hard freeze

Threshold	Last spring (50%)	First fall (50%)
36°F (light frost possible on clear, calm nights)	Mar 26	Nov 8
32°F (freeze)	Mar 10	Nov 19
28°F (hard freeze)	Feb 26	Dec 1

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 Rowlett

Soil temperature now

2-inch depth

68°F 55°F or warmer
24-hour average · latest 73°F, as of Oct 17, 7:00 PM CDT

Estimate Not a measurement at this ZIP: distance-weighted average of Lake Ralph Hall (52 mi), City of Alvarado (52 mi), Henderson County North (52 mi).

4-inch depth

70°F 55°F or warmer
24-hour average · latest 73°F, as of Oct 17, 7:00 PM CDT

Estimate Not a measurement at this ZIP: distance-weighted average of Mustang Special (37 mi), Lake Ralph Hall (52 mi), City of Alvarado (52 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		45°	Mostly Clear
Sunday	70°	50°	Sunny
Monday	77°	55°	Sunny
Tuesday	80°	58°	Sunny
Wednesday	84°	61°	Sunny
Thursday	86°	64°	Sunny
Friday	86°	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: Lavon Dam, TX (NOAA GHCN-Daily ID USC00415094), elevation 510 ft, 10.4 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).

Nearby stations

Station	Distance	Last frost (50%)	First frost (50%)
Richardson, TX	14 mi	Mar 7	Nov 21
Dallas Love Fld, TX	18 mi	Mar 2	Nov 29
Mckinney Muni AP, TX	20 mi	Mar 18	Nov 11

The average last-frost dates of these stations span 16 days, a rough guide to local variation. See data sources & methods.

Questions

When is the last frost in 75088?

The average (50% chance) last spring freeze of 32°F for ZIP 75088 is March 10. For a safer planting date, use March 31, when only 1 year in 10 still sees a later freeze.

When is the first frost in 75088?

The average first fall freeze is November 19. In 1 year in 10 it comes by November 1.

What hardiness zone is 75088?

ZIP 75088 is in USDA zone 8b (15 to 20°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.

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