When is the last frost in Lake Arthur, LA?

For ZIP code 70549, the average last spring frost (32°F) is February 10, based on NOAA 1991-2020 climate normals for the Lake Arthur 7 Sw, LA weather station. There is a 1-in-10 chance of a frost after March 8.

When is the first frost in Lake Arthur, LA?

The average first fall frost (32°F) is December 11. There is a 1-in-10 chance of frost by November 19, so tender plants are at risk from that point on.

How long is the growing season in 70549?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 307 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 70549Lake Arthur, LA

The average last spring frost in Lake Arthur is February 10 and the average first fall frost is December 11, giving a typical growing season of about 307 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Feb 10
Average first fall frost: Dec 11
Growing season: 307 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)	Feb 1 · Feb 27 · Mar 22	Nov 7 · Nov 26 · Dec 19	272 days	100%
Frost / freeze (32°F)	Jan 10 · Feb 10 · Mar 8	Nov 19 · Dec 11 · Jan 15	307 days	98%
Hard freeze (28°F)	Dec 25 · Jan 25 · Feb 24	Dec 1 · Jan 1 · Feb 1	341 days	80%

Where these dates come from

ZIP code 70549 is matched to the NOAA station Lake Arthur 7 Sw, LA, 11.4 km away, at 11 ft elevation (5 ft lower than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Lake Arthur 7 Sw, LA (used)	11 ft	Feb 10	Dec 11
Jennings, LA	25 ft	Feb 19	Dec 4
Crowley 2 Ne, LA	25 ft	Feb 20	Dec 4
Rockefeller Wl Refuge, LA	4 ft	Feb 2	Dec 23

Frost dates near Lake Arthur

Jennings, LA 70546 · last Feb 19, first Dec 4
Mermentau, LA 70556 · last Feb 19, first Dec 4
Gueydan, LA 70542 · last Feb 10, first Dec 11
Roanoke, LA 70581 · last Feb 19, first Dec 4
Morse, LA 70559 · last Feb 20, first Dec 4
Welsh, LA 70591 · last Feb 19, first Dec 4
Hayes, LA 70646 · last Feb 10, first Dec 11
Estherwood, LA 70534 · last Feb 20, first Dec 4

Frequently asked questions

When is the last frost in Lake Arthur, LA?: For ZIP code 70549, the average last spring frost (32°F) is February 10, based on NOAA 1991-2020 climate normals for the Lake Arthur 7 Sw, LA weather station. There is a 1-in-10 chance of a frost after March 8.
When is the first frost in Lake Arthur, LA?: The average first fall frost (32°F) is December 11. There is a 1-in-10 chance of frost by November 19, so tender plants are at risk from that point on.
How long is the growing season in 70549?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 307 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.