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
The arrival of December corresponds with a shift in temperature, down from a fresh 54.1°F (12.3°C) in November to a chilly 45.1°F (7.3°C). During December, Saint Mary experiences an average low-temperature of 33.1°F (0.6°C) at night.Humidity
The months with the highest humidity are February and December, with an average relative humidity of 80%.Rainfall
In Saint Mary, in December, during 12.2 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. In Saint Mary, during the entire year, the rain falls for 163.3 days and collects up to 32.09" (815mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Saint Mary, in December, snow falls for 5 days, with typically accumulated 1.06" (27mm) of snow. In Saint Mary, Kentucky, during the entire year, snow falls for 27.3 days and aggregates up to 7.91" (201mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 7:38 am and sunset at 5:23 pm. On the last day of December, in Saint Mary, sunrise is at 7:56 am and sunset at 5:33 pm EST.
Sunshine
In Saint Mary, the average sunshine in December is 4.4h.UV index
The months with the lowest UV index in Saint Mary, Kentucky, are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Frequently asked questions
What are December temperatures in Saint Mary?
What is the most humid month in Saint Mary?
What is the average humidity in December in Saint Mary?
How many days does it rain in December in Saint Mary?
How much does it snow in Saint Mary in December?
What is the month with the shortest days in Saint Mary?
How many hours of daylight does Saint Mary have in December?
What time are sunrise and sunset in December in Saint Mary?
How many hours of sunshine does Saint Mary have in December?
What are the months with the lowest UV index in Saint Mary?
What is the UV index reading in December in Saint Mary?
Average temperature in December
Saint Mary, KY
- Average high temperature in December: 45.1°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in December: 33.1°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure in December
Saint Mary, KY
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Saint Mary, KY
- Average wind speed in December: 7.8mph
The windiest months (with the highest average wind speed) are January and February (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
Saint Mary, KY
- Average humidity in December: 80%
The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is October (75%).
Average rainfall in December
Saint Mary, KY
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (2.13").
Average rainfall days in December
Saint Mary, KY
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (9.6 days).
Average snowfall in December
Saint Mary, KY
- Average snowfall in December: 1.06"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Saint Mary, KY
- Average snowfall days in December: 5 days
The month with the highest number of snowfall days is January (7.8 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 Mary, KY
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Saint Mary, KY
- Average sunshine days in December: 14.6 days
The month with the most sunshine days is October (18.2 days).
The month with the least sunshine days is July (11 days).
Average UV index in December
Saint Mary, KY
- 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
Saint Mary, KY
- Average cloud cover in December: 55
The months with the most cloud cover are January and February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Saint Mary, KY
- Average visibility in December: 6mi
The months with the highest visibility are March, April, June, August, October, November and December (6mi).
The months with the lowest visibility are January, February, May, July and September (5mi).
Saint Mary, Kentucky, USA
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