December weather forecastPlano, TX
December
Weather in December
Embracing the onset of winter, December in Plano, Texas showcases a noticeable dip in temperature, ranging from 41.2°F (5.1°C) to 54.9°F (12.7°C). The final show of the year stages the shortest days, culminating in the winter solstice. A significant rise in cloud cover and a steady breeze heralds the expected arrival of chillier days and frosty nights. Although snowfall is barely noticeable, the city spectates the occasional light flurry. The calendar year concludes with ideally crisp weather, signaling the cyclical nature of Plano’s climatic journey.Temperature
The commencement of December involves a temperature shift, with the average high-temperature dropping from a refreshing 63.9°F (17.7°C) in November to a fresh 54.9°F (12.7°C). Throughout December, Plano witnesses a consistent average low-temperature of 41.2°F (5.1°C).Humidity
The average relative humidity in December is 70%.Rainfall
In Plano, in December, during 9.6 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. In Plano, during the entire year, the rain falls for 143 days and collects up to 33.15" (842mm) of precipitation.Snowfall
January, February, November and December are months with snowfall. In December, it is snowing for 0.4 days. Throughout December, 0.12" (3mm) of snow is accumulated. Throughout the year, there are 2.9 snowfall days, and 1.14" (29mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 10h and 0min of daylight.On the first day of December in Plano, sunrise is at 7:12 am and sunset at 5:19 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:30 pm CST.
Sunshine
With an average of 5.5h of sunshine, December has the least sunshine of the year.UV index
January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 3 suggests these recommendations:
Exercise prevention - Warding off sunburn is urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Plano, TX
- Average high temperature in December: 54.9°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (54°F).
- Average low temperature in December: 41.2°F
The month with the highest average low temperature is July (76.1°F).
The coldest month (with the lowest average low temperature) is January (38.7°F).
Average pressure in December
Plano, 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 (29.91"Hg).
Average wind speed in December
Plano, TX
- Average wind speed in December: 8.6mph
The windiest months (with the highest average wind speed) are March and April (9.9mph).
The calmest month (with the lowest average wind speed) is September (6.8mph).
Average humidity in December
Plano, TX
- Average humidity in December: 70%
The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (56%).
Average rainfall in December
Plano, TX
- Average rainfall in December: 2.2"
The wettest month (with the highest rainfall) is October (4.21").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in December
Plano, TX
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is January (7.1 days).
Average snowfall in December
Plano, TX
- Average snowfall in December: 0.12"
The month with the highest snowfall is February (0.71").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").
Average snowfall days in December
Plano, TX
- Average snowfall days in December: 0.4 days
The month with the highest number of snowfall days is February (1.3 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
Plano, 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 30min
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 30min).
Average sunshine days in December
Plano, TX
- Average sunshine days in December: 19.4 days
The month with the most sunshine days is January (22.5 days).
The month with the least sunshine days is April (13.9 days).
Average UV index in December
Plano, 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 and December (UV index 3).
Average cloud cover in December
Plano, TX
- Average cloud cover in December: 38
The months with the most cloud cover are February and March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in December
Plano, 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).
