When is the last frost in Santa Rosa, TX?

For ZIP code 78593, the average last spring frost (32°F) is January 10, based on NOAA 1991-2020 climate normals for the Santa Rosa 3 Wnw, TX weather station. There is a 1-in-10 chance of a frost after February 24.

When is the first frost in Santa Rosa, TX?

The average first fall frost (32°F) is December 27. There is a 1-in-10 chance of frost by December 3, so tender plants are at risk from that point on.

How long is the growing season in 78593?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 355 days long.

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 78593Santa Rosa, TX

The average last spring frost in Santa Rosa is January 10 and the average first fall frost is December 27, giving a typical growing season of about 355 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 10
Average first fall frost: Dec 27
Growing season: 355 days

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 28 · Feb 3 · Mar 8	Nov 22 · Dec 12 · Jan 12	316 days	95%
Frost / freeze (32°F)	Dec 13 · Jan 10 · Feb 24	Dec 3 · Dec 27 · Feb 1	355 days	63%
Hard freeze (28°F)	Dec 11 · Jan 1 · Feb 1	Dec 8 · Dec 29 · Jan 24	365 days	23%

Where these dates come from

ZIP code 78593 is matched to the NOAA station Santa Rosa 3 Wnw, TX, 4.7 km away, at 50 ft elevation (3 ft lower than the ZIP code's center). Nearby stations for comparison:

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

Frost dates near Santa Rosa

Combes, TX 78535 · last Jan 9, first Jan 3
La Feria, TX 78559 · last Jan 10, first Dec 27
Sebastian, TX 78594 · last Jan 10, first Dec 27
Harlingen, TX 78551 · last Jan 9, first Jan 3
La Villa, TX 78562 · last Jan 10, first Dec 27
Mercedes, TX 78570 · last Jan 8, first Dec 31
Edcouch, TX 78538 · last Jan 10, first Dec 27
Elsa, TX 78543 · last Jan 10, first Dec 27

Frequently asked questions

When is the last frost in Santa Rosa, TX?: For ZIP code 78593, the average last spring frost (32°F) is January 10, based on NOAA 1991-2020 climate normals for the Santa Rosa 3 Wnw, TX weather station. There is a 1-in-10 chance of a frost after February 24.
When is the first frost in Santa Rosa, TX?: The average first fall frost (32°F) is December 27. There is a 1-in-10 chance of frost by December 3, so tender plants are at risk from that point on.
How long is the growing season in 78593?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 355 days long.
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.