Frost dates for ZIP 78592 (Iglesia Antigua, 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, Weslaco, TX (11 miles away).

Freezes are uncommon here

NOAA's normals for this station show a 32°F night in about 44% of years (about 1 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 850% chance of a 32°F freeze after this date
Average first fall frostDec 3150% chance of a 32°F freeze by this date
Growing season (frost-free)year-round in a typical yearmedian, 32°F threshold
USDA hardiness zone10a30 to 35°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 8 (prior Dec)
50% (the "average" last frost)	Jan 8
10% (safe-side: only 1 year in 10 freezes later)	Feb 18

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)	Dec 3
50% (the "average" first frost)	Dec 31
90% (late: most years have frozen by now)	Feb 7 (next year)

Light frost, freeze and hard freeze

Threshold	Last spring (50%)	First fall (50%)
36°F (light frost possible on clear, calm nights)	Jan 28	Dec 19
32°F (freeze)	Jan 8	Dec 31
28°F (hard freeze)	n/a	n/a

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 Iglesia Antigua

Soil temperature now

2-inch depth

77°F 55°F or warmer
24-hour average · latest 77°F, as of Oct 17, 8:00 PM CDT

Measured at USDA NRCS SCAN station Weslaco, 10 mi away. Daily averages: Thu 85°, Fri 81°.

4-inch depth

79°F 55°F or warmer
24-hour average · latest 79°F, as of Oct 17, 8:00 PM CDT

Measured at USDA NRCS SCAN station Weslaco, 10 mi away. Daily averages: Thu 85°, Fri 83°.

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		56°	Mostly Clear
Sunday	78°	63°	Mostly Sunny
Monday	83°	67°	Partly Sunny then Slight Chance Rain Showers
Tuesday	86°	70°	Mostly Sunny then Slight Chance Rain Showers
Wednesday	87°	68°	Chance Showers And Thunderstorms
Thursday	88°	66°	Sunny
Friday	89°	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.

Where these numbers come from

Station: Weslaco, TX (NOAA GHCN-Daily ID USC00419588), elevation 75 ft, 11.1 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).

Nearby stations

Station	Distance	Last frost (50%)	First frost (50%)
Santa Rosa 3 WNW, TX	14 mi	Jan 10	Dec 27
Harlingen, TX	15 mi	Jan 9	Jan 3 (next year)
Harlingen Rio Grande AP, TX	17 mi	Jan 8	Dec 29

The average last-frost dates of these stations span 2 days, a rough guide to local variation. See data sources & methods.

Questions

When is the last frost in 78592?

The average (50% chance) last spring freeze of 32°F for ZIP 78592 is January 8. For a safer planting date, use February 18, when only 1 year in 10 still sees a later freeze.

When is the first frost in 78592?

The average first fall freeze is December 31. In 1 year in 10 it comes by December 3.

What hardiness zone is 78592?

ZIP 78592 is in USDA zone 10a (30 to 35°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.

Other ZIP codes in Cameron County

78520 78521 78526 78535 78550 78552 78559 78566 78567 78575 78578 78583 78586 78593 78597 All Cameron County ZIPs