The best times to visit Bay St Louis for ideal weather are

February 19th to May 20th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Bay St Louis Travel Info

Weather in Bay St Louis


Average temperatures in Bay St Louis vary greatly. Considering humidity, temperatures feel nice some of the year, but often too hot in the summer and cold in the winter with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 27th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Bay St Louis, the hottest months are August, July, and then June. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 93°F (33.9°C) with temperatures rarely dropping below 75.7°F (24.3°C) at night.

Bay St Louis Temperatures (Fahrenheit)


Bay St Louis Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Bay St Louis Perceived Temperature (F)


Bay St Louis Perceived Temperature (C)



Average Bay St Louis Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 63.1 50.6 40.2
Feb 65.8 53.6 43.6
Mar 73 61.2 50.2
Apr 79.1 67.9 57.3
May 85.1 74.5 63.9
Jun 90.9 80.8 71.8
Jul 91.4 81.3 73.2
Aug 91.7 81.5 73.7
Sep 88 77.5 69.1
Oct 80.8 67.7 56.6
Nov 71.7 58.1 47.1
Dec 66.7 54.8 45.3

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 17.3 10.3 4.6
Feb 18.8 12 6.4
Mar 22.8 16.2 10.1
Apr 26.2 19.9 14.1
May 29.5 23.6 17.7
Jun 32.7 27.1 22.1
Jul 33 27.4 22.9
Aug 33.2 27.5 23.2
Sep 31.1 25.3 20.6
Oct 27.1 19.8 13.7
Nov 22.1 14.5 8.4
Dec 19.3 12.7 7.4



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Bay St Louis are October, November, and then May. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid March. For example, on the week of March 19th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid August with an average of 3 days of significant precipitation the week of August 13th.

When can you find snow in Bay St Louis? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Bay St Louis.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Bay St Louis (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 23% 0 4.1
Feb 25% 0 5.1
Mar 17% 0 4.5
Apr 20% 0 4.7
May 16% 0 4.7
Jun 24% 0 4.5
Jul 30% 0 7.1
Aug 29% 0 7.7
Sep 24% 0 5.3
Oct 11% 0 3.2
Nov 15% 0 2.6
Dec 24% 0 5.5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 23 0 10.4
Feb 25 0 13
Mar 17 0 11.4
Apr 20 0 11.9
May 16 0 11.9
Jun 24 0 11.4
Jul 30 0 18
Aug 29 0 19.6
Sep 24 0 13.5
Oct 11 0 8.1
Nov 15 0 6.6
Dec 24 0 14


Humidity and Wind

Bay St Louis has some very humid months, and above average humidity throughout the year. The least humid month is January (63.4% relative humidity), and the most humid month is September (72.2%).

Wind in Bay St Louis is usually calm. The windiest month is April, followed by February and March. April’s average wind speed of around 5.5 knots (6.3 MPH or 10.1 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early April where average top sustained speeds reach 13.2 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Bay St Louis.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 4.8 Light breeze 10.8 Gentle breeze
Feb 5.2 Light breeze 11.7 Significant breeze
Mar 5.1 Light breeze 12.2 Gentle breeze
Apr 5.5 Light breeze 12.5 Significant breeze
May 4.6 Light breeze 11.2 Gentle breeze
Jun 3.4 Barely noticeable 10.6 Gentle breeze
Jul 2.7 Barely noticeable 10 Gentle breeze
Aug 2.9 Barely noticeable 9.8 Gentle breeze
Sep 3.4 Barely noticeable 9.8 Gentle breeze
Oct 3.6 Barely noticeable 9.9 Gentle breeze
Nov 4 Light breeze 10.2 Gentle breeze
Dec 4.8 Light breeze 10.7 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 63.4%
Feb 64.6%
Mar 64.1%
Apr 66.4%
May 67%
Jun 68.8%
Jul 71.6%
Aug 72.1%
Sep 72.2%
Oct 66.3%
Nov 67.2%
Dec 71.5%


Is it Safe to Travel to Bay St Louis?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Bay St Louis, MS, US is February, followed by January and March. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Bay St Louis in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 63 in November means 63% of the tourists vs. February.



Overall Bay St Louis Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 88°F (31.1°C) and 67.8°F (19.9°C) with warmer temperatures in the later months. Rain is somewhat common with 5 to 6 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the most precipitation with 7 to 9 days of precipitation per month. June – August is fairly slow season for tourism in Bay St Louis, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 89.3°F (31.8°C) and 67.8°F (19.9°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 3 to 7 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is too cold this time of year in Bay St Louis to be enjoyable for warm weather travelers. The average high during this season is between 69.3°F (20.7°C) and 61.8°F (16.6°C). On average, it rains or snows a fair amount: consistently 7 times per month. These times of year are the busiest with tourists.


Best Times to Travelthe United States › Bay St Louis, MS, US