When is the last frost in Santa Maria, TX?

Frost occurs in about 44% of years at the nearest NOAA station (Weslaco, TX), so there is no reliable average last frost date.

When is the first frost in Santa Maria, TX?

Frost occurs in about 44% 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 78592Santa Maria, TX

Frost occurs in about 44% of years near Santa Maria, based on NOAA 1991-2020 records for the Weslaco, TX station.

Frost occurs in about 44% 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 18 · Jan 28 · Mar 1	Nov 25 · Dec 19 · Jan 27	331 days	85%
Frost / freeze (32°F)	Dec 8 · Jan 8 · Feb 18	Dec 3 · Dec 31 · Feb 7	365 days	44%
Hard freeze (28°F)	—	—	365 days	10%

Where these dates come from

ZIP code 78592 is matched to the NOAA station Weslaco, TX, 16.4 km away, at 75 ft elevation (10 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Weslaco, TX (used)	75 ft	Jan 8	Dec 31
Santa Rosa 3 Wnw, TX	50 ft	Jan 10	Dec 27
Harlingen, TX	38 ft	Jan 9	Jan 3
Harlingen Rio Grande Ap, TX	34 ft	Jan 8	Dec 29

Frost dates near Santa Maria

La Feria, TX 78559 · last Jan 10, first Dec 27
Progreso, TX 78579 · last Jan 8, first Dec 31
Mercedes, TX 78570 · last Jan 8, first Dec 31
Los Indios, TX 78567 · last Jan 9, first Jan 3
Harlingen, TX 78552 · last Jan 9, first Jan 3
Weslaco, TX 78599 · last Jan 8, first Dec 31
Santa Rosa, TX 78593 · last Jan 10, first Dec 27
San Benito, TX 78586 · last Jan 9, first Jan 3

Frequently asked questions

When is the last frost in Santa Maria, TX?: Frost occurs in about 44% of years at the nearest NOAA station (Weslaco, TX), so there is no reliable average last frost date.
When is the first frost in Santa Maria, TX?: Frost occurs in about 44% 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.