When is the last frost in Norco, LA?

For ZIP code 70079, the average last spring frost (32°F) is February 9, based on NOAA 1991-2020 climate normals for the Reserve, LA weather station. There is a 1-in-10 chance of a frost after March 11.

When is the first frost in Norco, LA?

The average first fall frost (32°F) is December 14. There is a 1-in-10 chance of frost by November 21, so tender plants are at risk from that point on.

How long is the growing season in 70079?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 308 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 70079Norco, LA

The average last spring frost in Norco is February 9 and the average first fall frost is December 14, giving a typical growing season of about 308 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Feb 9
Average first fall frost: Dec 14
Growing season: 308 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 8 · Nov 28 · Dec 22	275 days	100%
Frost / freeze (32°F)	Jan 13 · Feb 9 · Mar 11	Nov 21 · Dec 14 · Jan 13	308 days	97%
Hard freeze (28°F)	Dec 28 · Jan 28 · Feb 26	Dec 2 · Jan 1 · Feb 1	342 days	79%

Where these dates come from

ZIP code 70079 is matched to the NOAA station Reserve, LA, 16.4 km away, at 15 ft elevation (2 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Reserve, LA (used)	15 ft	Feb 9	Dec 14
New Orleans Intl Ap, LA	4 ft	Jan 30	Dec 31
New Orleans Audubon, LA	20 ft	Jan 24	Jan 2
New Orleans Lakefront Ap, LA	9 ft	Jan 22	Jan 5

Frost dates near Norco

New Sarpy, LA 70078 · last Jan 30, first Dec 31
Hahnville, LA 70057 · last Jan 30, first Dec 31
Destrehan, LA 70047 · last Jan 30, first Dec 31
Luling, LA 70070 · last Jan 30, first Dec 31
La Place, LA 70068 · last Feb 9, first Dec 14
Saint Rose, LA 70087 · last Jan 30, first Dec 31
Boutte, LA 70039 · last Jan 30, first Dec 31
Ama, LA 70031 · last Jan 30, first Dec 31

Frequently asked questions

When is the last frost in Norco, LA?: For ZIP code 70079, the average last spring frost (32°F) is February 9, based on NOAA 1991-2020 climate normals for the Reserve, LA weather station. There is a 1-in-10 chance of a frost after March 11.
When is the first frost in Norco, LA?: The average first fall frost (32°F) is December 14. There is a 1-in-10 chance of frost by November 21, so tender plants are at risk from that point on.
How long is the growing season in 70079?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 308 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.