When is the last frost in Lockport, LA?

For ZIP code 70374, the average last spring frost (32°F) is February 8, based on NOAA 1991-2020 climate normals for the Galliano, LA weather station. There is a 1-in-10 chance of a frost after March 12.

When is the first frost in Lockport, LA?

The average first fall frost (32°F) is December 19. 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 70374?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 311 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 70374Lockport, LA

The average last spring frost in Lockport is February 8 and the average first fall frost is December 19, giving a typical growing season of about 311 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Feb 8
Average first fall frost: Dec 19
Growing season: 311 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 29 · Feb 28 · Mar 21	Nov 12 · Dec 1 · Dec 29	279 days	100%
Frost / freeze (32°F)	Jan 11 · Feb 8 · Mar 12	Nov 20 · Dec 19 · Jan 22	311 days	95%
Hard freeze (28°F)	Dec 27 · Jan 28 · Mar 1	Dec 3 · Jan 3 · Feb 4	343 days	74%

Where these dates come from

ZIP code 70374 is matched to the NOAA station Galliano, LA, 21.5 km away, at 5 ft elevation (5 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Galliano, LA (used)	5 ft	Feb 8	Dec 19
Thibodaux 4 Se, LA	15 ft	Feb 5	Dec 14
Houma, LA	8 ft	Feb 5	Dec 17
Marrero 9 Ssw, LA	3 ft	Feb 10	Dec 12

Frost dates near Lockport

Larose, LA 70373 · last Feb 8, first Dec 19
Gheens, LA 70355 · last Feb 5, first Dec 14
Mathews, LA 70375 · last Feb 5, first Dec 14
Cut Off, LA 70345 · last Feb 8, first Dec 19
Bourg, LA 70343 · last Feb 5, first Dec 14
Montegut, LA 70377 · last Feb 8, first Dec 19
Raceland, LA 70394 · last Feb 5, first Dec 14
Des Allemands, LA 70030 · last Jan 30, first Dec 31

Frequently asked questions

When is the last frost in Lockport, LA?: For ZIP code 70374, the average last spring frost (32°F) is February 8, based on NOAA 1991-2020 climate normals for the Galliano, LA weather station. There is a 1-in-10 chance of a frost after March 12.
When is the first frost in Lockport, LA?: The average first fall frost (32°F) is December 19. 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 70374?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 311 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.