May weather forecastBay Saint Louis, MS
May
Weather in May
May indicates that Bay Saint Louis, Mississippi, is moving from spring to summer. Though warmer than April, May still maintains a comfortable climate, making for an agreeable mix of warmth and cool. The city experiences the highest annual relative humidity of 75%, bringing a sense of moisture to the air. With 13.7 daily daylight hours, it marks the start of the long, languid summer days. The sea temperature in May leaps to a refreshing 77.6°F (25.3°C), perfect for a variety of water sports.Temperature
The start of May signals a slight increase in the average high-temperature, moving from a moderately hot 75.6°F (24.2°C) in April to a still warm 81.7°F (27.6°C). Bay Saint Louis observes an average low-temperature of 69.8°F (21°C) during May nights.Heat index
Throughout May, the heat index is calculated to be a hot 86°F (30°C). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
The average relative humidity in May is 75%.Rainfall
In May, the rain falls for 10.8 days. Throughout May, 0.98" (25mm) of precipitation is accumulated. In Bay Saint Louis, during the entire year, the rain falls for 131.5 days and collects up to 12.01" (305mm) of precipitation.Snowfall
February through December are months without snowfall.Ocean temperature
In Bay Saint Louis, in May, the average water temperature is 77.5°F (25.3°C).Note: A water temperature from 77°F (25°C) to 84.2°F (29°C) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.
Daylight
The average length of the day in May is 13h and 41min.On the first day of May, sunrise is at 6:13 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 5:55 am and sunset at 7:54 pm CDT.
Sunshine
In May, the average sunshine is 10.8h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.Note: An average UV index of 7 in May transforms into this advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Bay Saint Louis, MS
- Average high temperature in May: 81.7°F
The warmest month (with the highest average high temperature) is August (89.2°F).
The month with the lowest average high temperature is January (58.8°F).
- Average low temperature in May: 69.8°F
The month with the highest average low temperature is August (77.9°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).
Average pressure in May
Bay Saint Louis, MS
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in May
Bay Saint Louis, MS
- Average wind speed in May: 7.6mph
The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in May
Bay Saint Louis, MS
- Average humidity in May: 75%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in May
Bay Saint Louis, MS
- Average rainfall in May: 0.98"
The wettest month (with the highest rainfall) is August (2.2").
The driest month (with the least rainfall) is March (0.51").
Average rainfall days in May
Bay Saint Louis, MS
- Average rainfall days in May: 10.8 days
The month with the highest number of rainy days is August (19.1 days).
The month with the least rainy days is November (4.9 days).
Average snowfall days in May
Bay Saint Louis, MS
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in May
Bay Saint Louis, MS
- Average sea temperature in May: 77.6°F
The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is January (56.8°F).
Average daylight in May /
Average sunshine in May
Bay Saint Louis, MS
- Average daylight in May: 13h and 42min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in May: 10h and 48min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in May
Bay Saint Louis, MS
- Average sunshine days in May: 16.8 days
The month with the most sunshine days is November (23.3 days).
The month with the least sunshine days is August (8 days).
Average UV index in May
Bay Saint Louis, MS
- Average UV index in May: 7
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 4).
Average cloud cover in May
Bay Saint Louis, MS
- Average cloud cover in May: 25
The month with the most cloud cover is December (Cloud cover 44).
The month with the least cloud cover is October (Cloud cover 23).
Average visibility in May
Bay Saint Louis, MS
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
