When is the last frost in San Benito, TX?

Frost occurs in about 31% of years at the nearest NOAA station (Harlingen, TX), so there is no reliable average last frost date.

When is the first frost in San Benito, TX?

Frost occurs in about 31% 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 78586San Benito, TX

Frost occurs in about 31% of years near San Benito, based on NOAA 1991-2020 records for the Harlingen, TX station.

Frost occurs in about 31% 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 17 · Jan 21 · Feb 28	Nov 29 · Dec 26 · Feb 2	340 days	79%
Frost / freeze (32°F)	Dec 15 · Jan 9 · Feb 4	Dec 9 · Jan 3 · Jan 29	365 days	31%
Hard freeze (28°F)	—	—	365 days	5%

Where these dates come from

ZIP code 78586 is matched to the NOAA station Harlingen, TX, 8.2 km away, at 38 ft elevation (1 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Harlingen, TX (used)	38 ft	Jan 9	Jan 3
Harlingen Rio Grande Ap, TX	34 ft	Jan 8	Dec 29
Santa Rosa 3 Wnw, TX	50 ft	Jan 10	Dec 27
Port Isabel Cameron Ap, TX	19 ft	Jan 8	Jan 4

Frost dates near San Benito

Harlingen, TX 78550 · 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
Olmito, TX 78575 · last Jan 6, first Jan 2
Rio Hondo, TX 78583 · last Jan 8, first Dec 29
Combes, TX 78535 · last Jan 9, first Jan 3
La Feria, TX 78559 · last Jan 10, first Dec 27
Brownsville, TX 78523 · last Jan 6, first Jan 2

Frequently asked questions

When is the last frost in San Benito, TX?: Frost occurs in about 31% of years at the nearest NOAA station (Harlingen, TX), so there is no reliable average last frost date.
When is the first frost in San Benito, TX?: Frost occurs in about 31% 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.