Bay St. Louis, MS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bay St. Louis, a city in Hancock County, Mississippi.
Overnight
73°F
Clear
Clear, with a low around 73. Northwest wind around 0 mph.
7-day forecast for Bay St. Louis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Clear | 0 mph | 0% |
| Saturday | 93°F | Sunny | 0 to 5 mph E | 2% |
| Saturday Night | 75°F | Mostly Clear | 0 to 5 mph SW | 2% |
| Sunday | 93°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 24% |
| Sunday Night | 75°F | Mostly Clear | 0 to 5 mph SW | 5% |
| Monday | 93°F | Sunny then Chance Showers And Thunderstorms | 0 to 5 mph E | 33% |
| Monday Night | 75°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 33% |
| Tuesday | 92°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 23% |
| Tuesday Night | 74°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph NW | 23% |
| Wednesday | 92°F | Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph E | 15% |
| Wednesday Night | 73°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph NE | 15% |
| Thursday | 90°F | Sunny | 5 to 10 mph E | 11% |
| Thursday Night | 72°F | Mostly Clear | 5 mph E | 11% |
| Friday | 88°F | Sunny | 5 to 10 mph E | 6% |
Forecast source: National Weather Service (api.weather.gov) for Bay St. Louis (30.323, -89.359). Updated through the day.
Growing snapshot for Bay St. Louis
Last spring frost
Feb 21
First fall frost
Dec 3
Growing season
287 days
Hardiness zone
9a
More local growing data for Bay St. Louis: nearby ZIP 39576 weather · frost dates · planting calendar · Mississippi frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Waveland, Ms (0.3 mi from Bay St. Louis). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.