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Will it freeze in Bay St. Louis in the next 7 nights?
No overnight lows at or below 32°F are forecast in Bay St. Louis during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 59°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 59°F Above 36°F · Mostly Clear
- Fri, Nov 6 55°F Above 36°F · Mostly Clear
- Sat, Nov 7 49°F Above 36°F · Partly Cloudy
- Sun, Nov 8 49°F Above 36°F · Mostly Cloudy
- Mon, Nov 9 50°F Above 36°F · Partly Cloudy
- Tue, Nov 10 51°F Above 36°F · Slight Chance Rain Showers
- 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 Bay St. Louis
The median first fall hard-freeze date (28°F) is December 25, from NOAA’s 1991–2020 Climate Normals at Waveland. 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 15 · Mar 10 · Apr 3 | Nov 2 · Nov 19 · Dec 9 | 255 days |
| 32°F freeze | Jan 25 · Feb 21 · Mar 18 | Nov 13 · Dec 3 · Jan 2 | 287 days |
| 28°F hard freeze | Dec 31 · Feb 2 · Mar 6 | Nov 27 · Dec 25 · Jan 25 | 321 days |
Average high temperature by month
1991–2020 normals at Waveland
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 Bay St. Louis, MS come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: Waveland (station USC00229426, elevation 8 ft), 2.5 mi from Bay St. Louis. 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 Bay St. Louis
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Waveland, MS | 3.1 mi | Feb 21 | Dec 3 |
| Diamondhead, MS | 4.3 mi | Feb 21 | Dec 3 |
| Pass Christian, MS | 7.5 mi | Feb 18 | Dec 14 |
| Long Beach, MS | 12 mi | Feb 18 | Dec 14 |
| Gulfport, MS | 19 mi | Feb 23 | Dec 3 |
| Picayune, MS | 24 mi | Mar 9 | Nov 18 |
| Slidell, LA | 25 mi | Feb 24 | Dec 1 |
| Biloxi, MS | 26 mi | Feb 12 | Dec 14 |
| D'Iberville, MS | 29 mi | Feb 12 | Dec 14 |
| Ocean Springs, MS | 34 mi | Feb 12 | Dec 14 |
Frequently asked questions
When is the last frost in Bay St. Louis?
On average, the last spring frost (32°F) in Bay St. Louis is around February 21. In about 1 year in 10 it comes after March 18, and in 9 years in 10 it comes after January 25.
When is the first frost in Bay St. Louis?
The first fall frost (32°F) usually arrives around December 3. There’s a 10% chance of a freeze by November 13 and a 90% chance by January 2.
Can it frost in Bay St. Louis 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 10.
What growing zone is Bay St. Louis?
Bay St. Louis 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 39576. See growing zones in Mississippi.
More: all Mississippi frost dates · Mississippi growing zones · frost vs. freeze