When is the last frost in Brownsville, TX?

Frost occurs in about 26% of years at the nearest NOAA station (Brownsville, TX), so there is no reliable average last frost date.

When is the first frost in Brownsville, TX?

Frost occurs in about 26% of years at the nearest NOAA station.

Are these frost dates a forecast?

No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.

Frost dates for 78521Brownsville, TX

Frost occurs in about 26% of years near Brownsville, based on NOAA 1991-2020 records for the Brownsville, TX station.

Frost occurs in about 26% of years. Frost-tender plants can usually grow year-round, but cover them if a rare cold snap is forecast.

Frost risk by date

NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.

Spring dates: chance of a frost AFTER the date. Fall dates: chance of a frost BEFORE the date.
Temperature	Last spring: 90% / 50% / 10% chance	First fall: 10% / 50% / 90% chance	Growing season (50%)	Years with at least one
Light frost (36°F)	Dec 19 · Jan 16 · Feb 18	Nov 30 · Dec 30 · Feb 1	350 days	70%
Frost / freeze (32°F)	Dec 11 · Jan 6 · Feb 1	Dec 8 · Jan 2 · Jan 29	365 days	26%
Hard freeze (28°F)	—	—	365 days	2%

Where these dates come from

ZIP code 78521 is matched to the NOAA station Brownsville, TX, 4.3 km away, at 23 ft elevation (3 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Brownsville, TX (used)	23 ft	Jan 6	Jan 2
Wfo Brownsville, TX	15 ft	Jan 9	Jan 4
Port Isabel, TX	17 ft	Jan 3	Jan 1
Port Isabel Cameron Ap, TX	19 ft	Jan 8	Jan 4

Frost dates near Brownsville

Brownsville, TX 78522 · last Jan 6, first Jan 2
Olmito, TX 78575 · last Jan 6, first Jan 2
Port Isabel, TX 78578 · last Jan 3, first Jan 1
Los Fresnos, TX 78566 · last Jan 8, first Jan 4
San Benito, TX 78586 · last Jan 9, first Jan 3
Lozano, TX 78568 · last Jan 8, first Dec 29
Los Indios, TX 78567 · last Jan 9, first Jan 3
Rio Hondo, TX 78583 · last Jan 8, first Dec 29

Frequently asked questions

When is the last frost in Brownsville, TX?: Frost occurs in about 26% of years at the nearest NOAA station (Brownsville, TX), so there is no reliable average last frost date.
When is the first frost in Brownsville, TX?: Frost occurs in about 26% of years at the nearest NOAA station.
Are these frost dates a forecast?: No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.