When is the last frost in Patterson, LA?

For ZIP code 70392, the average last spring frost (32°F) is January 30, based on NOAA 1991-2020 climate normals for the Morgan City, LA weather station. There is a 1-in-10 chance of a frost after March 5.

When is the first frost in Patterson, LA?

The average first fall frost (32°F) is January 1. There is a 1-in-10 chance of frost by December 2, so tender plants are at risk from that point on.

How long is the growing season in 70392?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 335 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 70392Patterson, LA

The average last spring frost in Patterson is January 30 and the average first fall frost is January 1, giving a typical growing season of about 335 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Jan 30
Average first fall frost: Jan 1
Growing season: 335 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 15 · Feb 15 · Mar 13	Nov 20 · Dec 14 · Jan 14	302 days	98%
Frost / freeze (32°F)	Dec 30 · Jan 30 · Mar 5	Dec 2 · Jan 1 · Feb 2	335 days	80%
Hard freeze (28°F)	Dec 27 · Jan 22 · Mar 1	Dec 17 · Jan 6 · Feb 5	365 days	44%

Where these dates come from

ZIP code 70392 is matched to the NOAA station Morgan City, LA, 10.3 km away, at 5 ft elevation (2 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Morgan City, LA (used)	5 ft	Jan 30	Jan 1
Salt Point, LA	4 ft	Feb 2	Dec 26
Franklin 3 Nw, LA	12 ft	Feb 11	Dec 8
Houma, LA	8 ft	Feb 5	Dec 17

Frost dates near Patterson

Morgan City, LA 70380 · last Jan 30, first Jan 1
Berwick, LA 70342 · last Jan 30, first Jan 1
Centerville, LA 70522 · last Feb 11, first Dec 8
Amelia, LA 70340 · last Jan 30, first Jan 1
Garden City, LA 70540 · last Feb 11, first Dec 8
Franklin, LA 70538 · last Feb 11, first Dec 8
Pierre Part, LA 70339 · last Feb 21, first Dec 5
Gibson, LA 70356 · last Jan 30, first Jan 1

Frequently asked questions

When is the last frost in Patterson, LA?: For ZIP code 70392, the average last spring frost (32°F) is January 30, based on NOAA 1991-2020 climate normals for the Morgan City, LA weather station. There is a 1-in-10 chance of a frost after March 5.
When is the first frost in Patterson, LA?: The average first fall frost (32°F) is January 1. There is a 1-in-10 chance of frost by December 2, so tender plants are at risk from that point on.
How long is the growing season in 70392?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 335 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.