Frost dates in Brownsville, Texas

NOAA 1991–2020 normals for a 32 °F freeze. Low spots and the edge of town run colder than downtown.

Short answer

The average last spring frost in Brownsville is January 6, and the average first fall frost is January 2, from NOAA's Brownsville station, 6 miles from the middle of Brownsville. 1 year in 10 the last frost comes after February 1, and the first one by December 8. That leaves about 361 frost-free days. Brownsville is in USDA planting zone 10a.

Weather stations around Brownsville

The first row is the date most people in Brownsville go by. The others show how far the dates move across the area.

Station	Last spring frost	First fall frost	Frost-free
Brownsville 6 mi away, 23 ft	January 6 1 in 10 after February 1	January 2 1 in 10 by December 8	361 days
Wfo Brownsville 6 mi away, 15 ft	January 9 1 in 10 after March 1	January 4 1 in 10 by December 9	360 days
Port Isabel 13 mi away, 17 ft	January 3 1 in 10 after February 2	January 1 1 in 10 by December 7	363 days
Port Isabel Cameron Airport 15 mi away, 19 ft	January 8 1 in 10 after February 7	January 4 1 in 10 by December 10	361 days
Harlingen 19 mi away, 38 ft	January 9 1 in 10 after February 4	January 3 1 in 10 by December 9	359 days

Distances are from the middle of Brownsville as the Census Bureau maps it. The average date is NOAA's 50% date: half of years have a later last frost, or an earlier first one. Plan by the 1-in-10 date if a freeze would cost you plants. The planting zone is the USDA 2023 zone for ZIP code 78526, at the middle of the city.

Your exact ZIP code

Brownsville covers a lot of ground. For the station nearest your own street, and its planting zone, type your ZIP code.

How these dates work

Frost dates come from NOAA's 1991 to 2020 Climate Normals, which work out from each weather station's daily lows how likely the last spring freeze and the first fall freeze (32 °F) are by each date. We use the station nearest the middle of your ZIP code and show its height and distance, since a station on a hill or by a lake can differ from your yard.

The average date is the 50% date: half of years have a freeze after the spring date or before the fall one. The 1-in-10 dates are NOAA's 10% dates, the ones to plan by if a late freeze would cost you plants. Within one yard, cold air pools in low spots while walls and paving hold heat, so some corners freeze before others.

More frost dates

All of Texas, station by station.

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