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Will it freeze in Port Allen in the next 7 nights?
No overnight lows at or below 32°F are forecast in Port Allen during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 57°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 57°F Above 36°F · Mostly Clear
- Fri, Nov 6 55°F Above 36°F · Mostly Clear
- Sat, Nov 7 50°F Above 36°F · Partly Cloudy
- Sun, Nov 8 49°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 49°F Above 36°F · Partly Cloudy then Slight Chance Rain Showers
- Tue, Nov 10 50°F Above 36°F · Mostly Clear
- Wed, Nov 11 52°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 Port Allen
The median first fall hard-freeze date (28°F) is December 9, from NOAA’s 1991–2020 Climate Normals at Brusly 2 W. 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 | Feb 22 · Mar 17 · Apr 7 | Oct 27 · Nov 10 · Nov 28 | 240 days |
| 32°F freeze | Jan 31 · Feb 28 · Mar 21 | Nov 6 · Nov 24 · Dec 17 | 268 days |
| 28°F hard freeze | Jan 10 · Feb 8 · Mar 8 | Nov 17 · Dec 9 · Jan 13 | 304 days |
Average high temperature by month
1991–2020 normals at Brusly 2 W
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 Port Allen, LA come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Brusly 2 W (station USC00161246, elevation 20 ft), 5.2 mi from Port Allen. 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 Port Allen
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Baton Rouge, LA | 4.3 mi | Feb 28 | Nov 26 |
| Addis, LA | 6.2 mi | Feb 28 | Nov 24 |
| Baker, LA | 9.9 mi | Feb 25 | Nov 26 |
| Plaquemine, LA | 11 mi | Feb 28 | Nov 26 |
| St. George, LA | 12 mi | Feb 28 | Nov 26 |
| Central, LA | 13 mi | Feb 25 | Nov 26 |
| St. Gabriel, LA | 14 mi | Feb 9 | Dec 13 |
| Denham Springs, LA | 15 mi | Feb 25 | Nov 26 |
| Zachary, LA | 16 mi | Feb 25 | Nov 26 |
| Walker, LA | 21 mi | Feb 25 | Nov 26 |
Frequently asked questions
When is the last frost in Port Allen?
On average, the last spring frost (32°F) in Port Allen is around February 28. In about 1 year in 10 it comes after March 21, and in 9 years in 10 it comes after January 31.
When is the first frost in Port Allen?
The first fall frost (32°F) usually arrives around November 24. There’s a 10% chance of a freeze by November 6 and a 90% chance by December 17.
Can it frost in Port Allen 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 March 17.
What growing zone is Port Allen?
Port Allen is in USDA Plant Hardiness Zone 9a (average annual extreme minimum temperature 20 to 25°F), based on the 2023 USDA map for ZIP code 70825. See growing zones in Louisiana.
More: all Louisiana frost dates · Louisiana growing zones · frost vs. freeze