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
With the onset of December, Mount Vernon experiences a modest temperature adjustment, with the average high-temperature receding from an enjoyable 63.5°F (17.5°C) in November to a cool 54.5°F (12.5°C). Mount Vernon, in the month of December, anticipates a consistent average low-temperature of 40.1°F (4.5°C).Humidity
The average relative humidity in December is 76%.Rainfall
In December, the rain falls for 7.6 days. Throughout December, 1.18" (30mm) of precipitation is accumulated. In Mount Vernon, during the entire year, the rain falls for 112.3 days and collects up to 13.7" (348mm) of precipitation.Snowfall
April through December are months without snowfall.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:06 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:24 pm CST.
Sunshine
With an average of 5.3h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In December, the maximum UV index of 3 suggests these recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Boost your sun resistance with garments that are densely woven yet spacious. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Mount Vernon in December?
What is the average humidity in December?
How much does it rain in December?
When it does not snow?
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?
What is the month with the least sunshine in Mount Vernon?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Mount Vernon, TX
- Average high temperature in December: 54.5°F
The warmest month (with the highest average high temperature) is August (93.9°F).
The month with the lowest average high temperature is January (52.9°F).
- Average low temperature in December: 40.1°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37°F).
Average pressure in December
Mount Vernon, TX
- 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
Mount Vernon, TX
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Mount Vernon, TX
- Average humidity in December: 76%
The months with the highest relative humidity are February and May (78%).
The month with the lowest relative humidity is August (66%).
Average rainfall in December
Mount Vernon, TX
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is October (1.69").
The driest month (with the least rainfall) is September (0.59").
Average rainfall days in December
Mount Vernon, TX
- Average rainfall days in December: 7.6 days
The month with the highest number of rainy days is May (11.7 days).
The month with the least rainy days is January (6.9 days).
Average snowfall in December
Mount Vernon, TX
- Average snowfall in December: 0"
The month with the highest snowfall is January (0.35").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Mount Vernon, TX
- Average snowfall days in December: 0.3 days
The months with the highest number of snowfall days are January and February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Mount Vernon, TX
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Mount Vernon, TX
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is October (21.6 days).
The month with the least sunshine days is August (15.8 days).
Average UV index in December
Mount Vernon, TX
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Mount Vernon, TX
- Average cloud cover in December: 42
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in December
Mount Vernon, TX
- 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).
Mount Vernon, Texas, USA
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