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
In Saint Martins, the average high-temperature in December decreases from a cool 53.4°F (11.9°C) in November to a wintry 42.4°F (5.8°C). Saint Martins registers a consistent average low-temperature of 28.9°F (-1.7°C) during December.Humidity
The average relative humidity in December is 76%.Rainfall
In Saint Martins, during December, the rain falls for 6.3 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, there are 133.5 rainfall days, and 25.2" (640mm) of precipitation is accumulated.Snowfall
January through March, October through December are months with snowfall. In Saint Martins, during December, snow falls for 3.2 days and regularly aggregates up to 1.06" (27mm) of snow. Throughout the year, there are 18.2 snowfall days, and 6.97" (177mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:08 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:58 pm CST.
Sunshine
In Saint Martins, the average sunshine in December is 5.1h.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 vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 2 during December translates into the following guidance:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. To guard against the harmful effects of the Sun, minimize exposure during midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in Saint Martins in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
How many hours of sunshine does Saint Martins have in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Saint Martins, MO
- Average high temperature in December: 42.4°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in December
Saint Martins, 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
Saint Martins, MO
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in December
Saint Martins, MO
- Average humidity in December: 76%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Saint Martins, MO
- Average rainfall in December: 1.22"
The wettest month (with the highest rainfall) is May (3.46").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in December
Saint Martins, MO
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in December
Saint Martins, MO
- Average snowfall in December: 1.06"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Saint Martins, MO
- Average snowfall days in December: 3.2 days
The month with the highest number of snowfall days is February (6.1 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
Saint Martins, 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 1min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Saint Martins, MO
- Average sunshine days in December: 20.8 days
The month with the most sunshine days is December (20.8 days).
The month with the least sunshine days is July (13.7 days).
Average UV index in December
Saint Martins, MO
- Average UV index in December: 2
The months with the highest UV index are 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
Saint Martins, MO
- Average cloud cover in December: 45
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June, July and August (Cloud cover 28).
Average visibility in December
Saint Martins, 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).
Saint Martins, Missouri, USA
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