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 in December
- Average snowfall days 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
A shift in the average high-temperature occurs in December, reducing from a cool 53.1°F (11.7°C) in November to a wintry 41.7°F (5.4°C). December's nights observe an average temperature of 29.8°F (-1.2°C).Humidity
The average relative humidity in December in Lake Saint Louis, Missouri, is 76%.Rainfall
In Lake Saint Louis, in December, it is raining for 8.5 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, there are 152.1 rainfall days, and 32.01" (813mm) of precipitation is accumulated.Snowfall
Months with snowfall in Lake Saint Louis, Missouri, are January through April, November and December. In Lake Saint Louis, in December, during 4 snowfall days, 1.34" (34mm) of snow is typically accumulated. Throughout the year, there are 21.4 snowfall days, and 8.62" (219mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of December in Lake Saint Louis, sunrise is at 7:03 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:51 pm CST.
Sunshine
In December, the average sunshine is 5h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Lake Saint Louis during December?
What is the average humidity in December in Lake Saint Louis?
How many days does it rain in December in Lake Saint Louis?
How much does it snow in Lake Saint Louis in December?
What is the month with the shortest days in Lake Saint Louis?
What is the average length of the day in December in Lake Saint Louis?
When are sunrise and sunset in December in Lake Saint Louis?
How long on average sun shines in December in Lake Saint Louis?
When is the lowest UV index in Lake Saint Louis?
How high is the UV index in December in Lake Saint Louis?
Average temperature in December
Lake Saint Louis, MO
- Average high temperature in December: 41.7°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (37.4°F).
- Average low temperature in December: 29.8°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in December
Lake Saint Louis, MO
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Lake Saint Louis, MO
- Average wind speed in December: 8.5mph
The windiest months (with the highest average wind speed) are January and February (8.9mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Lake Saint Louis, MO
- Average humidity in December: 76%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Lake Saint Louis, MO
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is April (3.82").
The driest month (with the least rainfall) is February (1.77").
Average rainfall days in December
Lake Saint Louis, MO
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.8 days).
Average snowfall in December
Lake Saint Louis, MO
- Average snowfall in December: 1.34"
The month with the highest snowfall is February (3.15").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Lake Saint Louis, MO
- Average snowfall days in December: 4 days
The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lake Saint Louis, MO
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 5h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Lake Saint Louis, MO
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Lake Saint Louis, MO
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Lake Saint Louis, MO
- Average cloud cover in December: 47
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Lake Saint Louis, MO
- 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).
Lake Saint Louis, Missouri, USA
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