When is the last frost in Los Fresnos, TX?

Frost occurs in about 35% of years at the nearest NOAA station (Port Isabel Cameron Ap, TX), so there is no reliable average last frost date.

When is the first frost in Los Fresnos, TX?

Frost occurs in about 35% 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 78566Los Fresnos, TX

Frost occurs in about 35% of years near Los Fresnos, based on NOAA 1991-2020 records for the Port Isabel Cameron Ap, TX station.

Frost occurs in about 35% 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 20 · Jan 22 · Feb 26	Dec 1 · Dec 29 · Jan 31	340 days	80%
Frost / freeze (32°F)	Dec 16 · Jan 8 · Feb 7	Dec 10 · Jan 4 · Feb 4	365 days	35%
Hard freeze (28°F)	—	—	365 days	7%

Where these dates come from

ZIP code 78566 is matched to the NOAA station Port Isabel Cameron Ap, TX, 8.5 km away, at 19 ft elevation (7 ft lower than the ZIP code's center). Nearby stations for comparison:

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

Frost dates near Los Fresnos

Port Isabel, TX 78578 · last Jan 3, first Jan 1
Lozano, TX 78568 · last Jan 8, first Dec 29
Olmito, TX 78575 · last Jan 6, first Jan 2
Brownsville, TX 78526 · last Jan 6, first Jan 2
Rio Hondo, TX 78583 · last Jan 8, first Dec 29
San Benito, TX 78586 · last Jan 9, first Jan 3
South Padre Island, TX 78597 · last Jan 8, first Jan 4
Harlingen, TX 78550 · last Jan 9, first Jan 3

Frequently asked questions

When is the last frost in Los Fresnos, TX?: Frost occurs in about 35% of years at the nearest NOAA station (Port Isabel Cameron Ap, TX), so there is no reliable average last frost date.
When is the first frost in Los Fresnos, TX?: Frost occurs in about 35% 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.