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Will it freeze in Gretna in the next 7 nights?
No overnight lows at or below 32°F are forecast in Gretna during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 63°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM CST to Fri, Nov 6, 6:00 AM CST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 63°F Above 36°F · Mostly Clear
- Fri, Nov 6 59°F Above 36°F · Mostly Clear
- Sat, Nov 7 54°F Above 36°F · Partly Cloudy
- Sun, Nov 8 54°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 55°F Above 36°F · Partly Cloudy
- Tue, Nov 10 55°F Above 36°F · Partly Cloudy then Slight Chance Rain Showers
- Wed, Nov 11 56°F Above 36°F · Partly Cloudy
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Gretna
The median first fall hard-freeze date (28°F) is January 8, from NOAA’s 1991–2020 Climate Normals at Terrytown 3S. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Jan 23 · Feb 22 · Mar 16 | Nov 17 · Dec 9 · Jan 7 | 292 days |
| 32°F freeze | Jan 2 · Feb 1 · Mar 6 | Dec 1 · Dec 31 · Jan 29 | 330 days |
| 28°F hard freeze | Dec 29 · Jan 23 · Feb 26 | Dec 20 · Jan 8 · Feb 9 | 361 days |
Average high temperature by month
1991–2020 normals at Terrytown 3S
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Gretna, LA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Terrytown 3S (station USC00168941, elevation 10 ft), 1.1 mi from Gretna. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Gretna
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Westwego, LA | 5.6 mi | Jan 24 | Jan 2 |
| Harahan, LA | 9.3 mi | Jan 24 | Jan 2 |
| New Orleans, LA | 12 mi | Jan 22 | Jan 5 |
| Kenner, LA | 14 mi | Jan 30 | Dec 31 |
| Slidell, LA | 30 mi | Feb 24 | Dec 1 |
| Mandeville, LA | 32 mi | Mar 12 | Nov 18 |
| Covington, LA | 40 mi | Mar 12 | Nov 18 |
| Ponchatoula, LA | 43 mi | Mar 8 | Nov 19 |
| Houma, LA | 45 mi | Feb 5 | Dec 17 |
| Thibodaux, LA | 47 mi | Feb 5 | Dec 14 |
Frequently asked questions
When is the last frost in Gretna?
On average, the last spring frost (32°F) in Gretna is around February 1. In about 1 year in 10 it comes after March 6, and in 9 years in 10 it comes after January 2.
When is the first frost in Gretna?
The first fall frost (32°F) usually arrives around December 31. There’s a 10% chance of a freeze by December 1 and a 90% chance by January 29.
Can it frost in Gretna after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after February 22.
What growing zone is Gretna?
Gretna is in USDA Plant Hardiness Zone 9b (average annual extreme minimum temperature 25 to 30°F), based on the 2023 USDA map for ZIP code 70053. See growing zones in Louisiana.
More: all Louisiana frost dates · Louisiana growing zones · frost vs. freeze