Dallas Weather in December

Winter weather is usually mild at Dallas, Texas. The nights can get crisp during December yet snow is unusual. The days are mainly balmy and sunny.

This page gives detailed information on the typical December temperature, precipitation, sun, humidity, wind and storms for Dallas. The temperature, precipitation and wind speed numbers here are historical averages based on climate data gathered at the Dallas Love Field Airport, located a few miles from downtown Dallas. The rest of the measurements are averages from the nearby Dallas - Fort Worth International Airport.

Temperature Weather iconTemperature

59 °F December average high 15 °C
40 °F December average low 4 °C
15 days 60 °F max. or more (16 °C)
18 days 40 °F min. or less (4 °C)

Nearly every December day warms to over 40 degrees Fahrenheit (4 degrees Celsius) in Dallas. The city averages six days this month when the thermometer reaches into the 70s °F (over 21 °C). In some Decembers, the temperature pops into the 80s F (above 27 °C).

The thermometer dips to freezing on an average of 7 nights. Although rare, a night in December can drop to 20 °F (-8 °C).

Rainy Weather iconPrecipitation

3.2 in total precipitation 82 mm
7 days of rain

Half the time, Dallas receives 1.7 to 4.4 inches (43 to 111 mm) of rainfall in December. One in four years has drier weather, while another one in four is wetter. Although snow is possible now, in most years December is free of snow.

Sunny Weather iconSun

52 % sunshine
11 days clear skies

December is one of the cloudiest months for Dallas. The sun's rays reach the ground during 52 percent of daylight hours on average, for a total of 162 hours in the month. Typically on 11 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in December at Dallas averages 10 hours and 1 minutes a day. The shortest days of the year, December 21st and 22nd, last 9 hours and 59 minutes from sunrise to sunset.

Humid Weather iconHumidity

68 % December average humidity

The relative humidity in Dallas during December usually peaks at 79 percent in the morning then drops to 51 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 73 77 79 76 59 51 59 68

Windy Weather iconWind

9.2 mph December wind speed average 14.8 kph

December is an average month for wind at Dallas.

Stormy Weather iconStorms

2 days rainfall of 0.5 inches (13 mm) or more
1 day with thunderstorms in December

The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

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