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Will it freeze in Harahan in the next 7 nights?
No overnight lows at or below 32°F are forecast in Harahan during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 62°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 62°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 then Slight Chance Rain Showers
- 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 Harahan
Most years have no 28°F hard freeze at New Orleans Audubon, according to NOAA’s 1991–2020 Climate Normals. Check the short-term forecast above during cold snaps.
| 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 11 · Feb 6 · Mar 7 | Nov 19 · Dec 16 · Jan 15 | 308 days |
| 32°F freeze | Dec 28 · Jan 24 · Feb 23 | Dec 5 · Jan 2 · Feb 1 | 341 days |
| 28°F hard freeze | Dec 29 · Jan 15 · Feb 8 | Dec 22 · Jan 8 · Feb 1 | 365 days |
Average high temperature by month
1991–2020 normals at New Orleans Audubon
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 Harahan, LA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: New Orleans Audubon (station USW00012930, elevation 20 ft), 4.5 mi from Harahan. 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 Harahan
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Westwego, LA | 4.3 mi | Jan 24 | Jan 2 |
| Kenner, LA | 6.2 mi | Jan 30 | Dec 31 |
| Gretna, LA | 9.3 mi | Feb 1 | Dec 31 |
| New Orleans, LA | 18 mi | Jan 22 | Jan 5 |
| Mandeville, LA | 31 mi | Mar 12 | Nov 18 |
| Slidell, LA | 35 mi | Feb 24 | Dec 1 |
| Ponchatoula, LA | 38 mi | Mar 8 | Nov 19 |
| Thibodaux, LA | 38 mi | Feb 5 | Dec 14 |
| Covington, LA | 38 mi | Mar 12 | Nov 18 |
| Houma, LA | 39 mi | Feb 5 | Dec 17 |
Frequently asked questions
When is the last frost in Harahan?
On average, the last spring frost (32°F) in Harahan is around January 24. In about 1 year in 10 it comes after February 23, and in 9 years in 10 it comes after December 28.
When is the first frost in Harahan?
The first fall frost (32°F) usually arrives around January 2. There’s a 10% chance of a freeze by December 5 and a 90% chance by February 1.
Can it frost in Harahan 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 6.
What growing zone is Harahan?
Harahan 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 70123. See growing zones in Louisiana.
More: all Louisiana frost dates · Louisiana growing zones · frost vs. freeze