When is the last frost in Port O Connor, TX?

For ZIP code 77982, the average last spring frost (32°F) is February 4, based on NOAA 1991-2020 climate normals for the Port O'Connor, TX weather station. There is a 1-in-10 chance of a frost after March 6.

When is the first frost in Port O Connor, TX?

The average first fall frost (32°F) is December 27. There is a 1-in-10 chance of frost by November 20, so tender plants are at risk from that point on.

How long is the growing season in 77982?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 323 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 77982Port O Connor, TX

The average last spring frost in Port O Connor is February 4 and the average first fall frost is December 27, giving a typical growing season of about 323 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Feb 4
Average first fall frost: Dec 27
Growing season: 323 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)	Jan 21 · Feb 20 · Mar 13	Nov 12 · Dec 6 · Jan 9	291 days	99%
Frost / freeze (32°F)	Dec 29 · Feb 4 · Mar 6	Nov 20 · Dec 27 · Feb 4	323 days	88%
Hard freeze (28°F)	Dec 15 · Jan 27 · Mar 1	Nov 27 · Jan 4 · Feb 20	364 days	51%

Where these dates come from

ZIP code 77982 is matched to the NOAA station Port O'Connor, TX, 2.7 km away, at 5 ft elevation (2 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Port O'Connor, TX (used)	5 ft	Feb 4	Dec 27
Pt Comfort, TX	20 ft	Feb 1	Dec 21
Palacios Muni Ap, TX	12 ft	Feb 1	Dec 17
Aransas Wr, TX	15 ft	Feb 7	Dec 13

Frost dates near Port O Connor

Port Lavaca, TX 77979 · last Feb 1, first Dec 21
Point Comfort, TX 77978 · last Feb 1, first Dec 21
Seadrift, TX 77983 · last Feb 7, first Dec 13
Palacios, TX 77465 · last Feb 1, first Dec 17
Lolita, TX 77971 · last Feb 1, first Dec 21
Collegeport, TX 77428 · last Feb 1, first Dec 17
La Salle, TX 77969 · last Feb 1, first Dec 21
Austwell, TX 77950 · last Feb 7, first Dec 13

Frequently asked questions

When is the last frost in Port O Connor, TX?: For ZIP code 77982, the average last spring frost (32°F) is February 4, based on NOAA 1991-2020 climate normals for the Port O'Connor, TX weather station. There is a 1-in-10 chance of a frost after March 6.
When is the first frost in Port O Connor, TX?: The average first fall frost (32°F) is December 27. There is a 1-in-10 chance of frost by November 20, so tender plants are at risk from that point on.
How long is the growing season in 77982?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 323 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.