Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
In Bay Saint Louis, the average high-temperature in December slightly decreases from an agreeable 68.2°F (20.1°C) in November to an enjoyable 62.1°F (16.7°C). During December, Bay Saint Louis witnesses a consistent average low-temperature of 50.7°F (10.4°C).Humidity
With an average relative humidity of 79%, December is the most humid month in Bay Saint Louis.Rainfall
In December, the rain falls for 8.3 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. Throughout the year, there are 131.5 rainfall days, and 12.01" (305mm) of precipitation is accumulated.Snowfall
In Bay Saint Louis, snow does not fall in February through December.Ocean temperature
In Bay Saint Louis, the average seawater temperature in December is 60.6°F (15.9°C).Note: The majority find it unenjoyable to swim in 60.6°F (15.9°C). Breathing becomes tougher as the water temperature descends under 69.8°F (21°C).
Daylight
With an average of 10h and 12min of daylight, December has the shortest days of the year in Bay Saint Louis, Mississippi.On the first day of the month, sunrise is at 6:36 am and sunset at 4:56 pm. On the last day of December, in Bay Saint Louis, sunrise is at 6:53 am and sunset at 5:07 pm CST.
Sunshine
The month with the least sunshine in Bay Saint Louis is December, with an average of 5.3h of sunshine.UV index
January, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Bay Saint Louis, Mississippi. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 in December translates into this advice:
Make use of precautions - Suggestions to resist sunburn are communicated. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What are the temperatures in Bay Saint Louis in December?
What is the most humid month in Bay Saint Louis?
What is the average humidity in December in Bay Saint Louis?
How many days does it rain in December in Bay Saint Louis?
When it does not snow in Bay Saint Louis?
Does it snow in Bay Saint Louis in December?
What is the ocean temperature in December in Bay Saint Louis?
What is the month with the shortest days in Bay Saint Louis?
How many hours of daylight does Bay Saint Louis have in December?
What time are sunrise and sunset in December in Bay Saint Louis?
What is the month with the least sunshine in Bay Saint Louis?
How many hours of sunshine does Bay Saint Louis have in December?
What is the month with the lowest UV index in Bay Saint Louis?
What is the UV index reading in December in Bay Saint Louis?
Average temperature in December
Bay Saint Louis, MS
- Average high temperature in December: 62.1°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 December: 50.7°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 December
Bay Saint Louis, MS
- Average pressure in December: 30.13"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 December
Bay Saint Louis, MS
- Average wind speed in December: 8.6mph
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 December
Bay Saint Louis, MS
- Average humidity in December: 79%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Bay Saint Louis, MS
- Average rainfall in December: 0.91"
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 December
Bay Saint Louis, MS
- Average rainfall days in December: 8.3 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 December
Bay Saint Louis, MS
- Average snowfall days in December: 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 December
Bay Saint Louis, MS
- Average sea temperature in December: 60.6°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 December /
Average sunshine in December
Bay Saint Louis, MS
- Average daylight in December: 10h and 1min
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 December: 5h and 2min
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 December
Bay Saint Louis, MS
- Average sunshine days in December: 19.9 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 December
Bay Saint Louis, MS
- Average UV index in December: 4
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 December
Bay Saint Louis, MS
- Average cloud cover in December: 44
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 December
Bay Saint Louis, MS
- Average visibility in December: 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).
Bay Saint Louis, Mississippi, USA
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