When is the last frost in Roma, TX?

For ZIP code 78584, the average last spring frost (32°F) is January 9, based on NOAA 1991-2020 climate normals for the Falcon Dam, TX weather station. There is a 1-in-10 chance of a frost after February 21.

When is the first frost in Roma, TX?

The average first fall frost (32°F) is January 1. There is a 1-in-10 chance of frost by December 8, so tender plants are at risk from that point on.

How long is the growing season in 78584?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 363 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 78584Roma, TX

The average last spring frost in Roma is January 9 and the average first fall frost is January 1, giving a typical growing season of about 363 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 9
Average first fall frost: Jan 1
Growing season: 363 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 27 · Jan 30 · Mar 5	Nov 27 · Dec 18 · Jan 14	324 days	92%
Frost / freeze (32°F)	Dec 17 · Jan 9 · Feb 21	Dec 8 · Jan 1 · Feb 4	363 days	55%
Hard freeze (28°F)	Dec 14 · Jan 3 · Feb 6	Dec 14 · Jan 2 · Feb 2	365 days	19%

Where these dates come from

ZIP code 78584 is matched to the NOAA station Falcon Dam, TX, 20.3 km away, at 320 ft elevation (61 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Falcon Dam, TX (used)	320 ft	Jan 9	Jan 1
Rio Grande City, TX	172 ft	Jan 31	Dec 17
Zapata 1 S, TX	320 ft	Jan 19	Dec 22
La Joya, TX	213 ft	Jan 23	Dec 28

Frost dates near Roma

Salineno, TX 78585 · last Jan 9, first Jan 1
Rio Grande City, TX 78582 · last Jan 31, first Dec 17
Falcon Heights, TX 78545 · last Jan 9, first Jan 1
Garciasville, TX 78547 · last Jan 31, first Dec 17
Lopeno, TX 78564 · last Jan 9, first Jan 1
Grulla, TX 78548 · last Jan 31, first Dec 17
Sullivan City, TX 78595 · last Jan 23, first Dec 28
Los Ebanos, TX 78565 · last Jan 23, first Dec 28

Frequently asked questions

When is the last frost in Roma, TX?: For ZIP code 78584, the average last spring frost (32°F) is January 9, based on NOAA 1991-2020 climate normals for the Falcon Dam, TX weather station. There is a 1-in-10 chance of a frost after February 21.
When is the first frost in Roma, TX?: The average first fall frost (32°F) is January 1. There is a 1-in-10 chance of frost by December 8, so tender plants are at risk from that point on.
How long is the growing season in 78584?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 363 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.