Bay Saint Louis (MS) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Bay Saint Louis

Bay Saint Louis average temperature chart (Celsius) Bay Saint Louis average temperature chart (Fahrenheit)
Average monthly temperatures in Bay Saint Louis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 14.6 16.6 20.1 24.4 28.1 31.1 32.1 31.8 30 25.9 20.7 16.6
°F 58.2 61.9 68.2 75.9 82.7 88 89.7 89.3 86 78.6 69.3 62

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Bay Saint Louis monthly rainfall chart (mm) Bay Saint Louis monthly rainfall chart (inches)
Average monthly rainfall in Bay Saint Louis (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 142 142 138 123 127 125 156 168 143 74 108 131
inches 5.6 5.6 5.4 4.9 5 4.9 6.1 6.6 5.6 2.9 4.3 5.2
Rainy days 10 9 9 7 8 11 14 13 10 5 8 10

Average annual rainfall in Bay Saint Louis: 1515.9734mm (596.8 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Bay Saint Louis

Bay Saint Louis average daily sunshine chart
Average daily sunshine Bay Saint Louis
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 6.6 7.6 9.1 9.5 9.2 8.5 8.4 7.9 8.2 6.6 5.8

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Bay Saint Louis average minimum / maximum temperatures (Celsius) Bay Saint Louis average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Bay Saint Louis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 4.6 6.4 9.7 14.2 17.9 21.1 22.1 21.9 20.2 14 9.6 6.5
Max °C 14.8 16.8 20.4 24.7 28.4 31.3 32.3 32.1 30.2 26.2 21 16.9
Min °F 40.2 43.6 49.4 57.6 64.3 70 71.7 71.5 68.3 57.2 49.3 43.6
Max °F 49.4 53 59 67 73.7 79.2 81 80.6 77.4 68.1 59.5 53

Sea temperature

The graph below shows the average sea temperature.

Bay Saint Louis average sea temperature chart (Celsius) Bay Saint Louis average sea temperature chart (Fahrenheit)
Average sea temperature around Bay Saint Louis in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 17.2 16.8 18 20.9 24.7 28.2 29.5 29.7 28.3 24.9 21.5 19
°F 63 62.2 64.4 69.5 76.5 82.8 85.2 85.4 83 76.8 70.7 66.2

Wind speed

The graph below shows the average wind speed.

Bay Saint Louis average winspeed by month (km/h) Bay Saint Louis average winspeed by month (mph)
Average wind speed in Bay Saint Louis (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 16 17 16 14 12 10 10 12 12 14 15
mph 10 10 10 10 9 7 6 6 7 8 9 9

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Bay Saint Louis relative humidity averages
Average relative humidity in Bay Saint Louis
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
74% 72% 72% 72% 73% 75% 78% 79% 77% 73% 75% 76%