Dallas
Texas, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Dallas, TX

Dallas, Texas, modern city skyscrapers viewed from above, just before sunset
Dallas, Texas, modern city skyscrapers viewed from above, just before sunset
In December, Dallas experiences the onset of winter, beginning with the drop in the temperature to the range of 38.5°F (3.6°C) and 57.6°F (14.2°C). Occasionally the temperature at night drops some few degrees below the freezing point resulting in minimal snowfall, but most of the time weather remains cool and steady.
The five and a half daily hours of sunshine keep the days warm and lovely, making outdoor ventures quite enjoyable. The average precipitation in December averages 2.7" (68.6mm), collected from an average of six and a half days.

What is the temperature in December in Dallas?

In December, in Dallas, Texas, the average high-temperature is 57.6°F (14.2°C), and the average low-temperature is 38.5°F (3.6°C).

What is the average humidity in December in Dallas?

The average relative humidity in December in Dallas, Texas, is 67.5%.

How many days does it rain in December in Dallas?

In Dallas, Texas, during December, the rain falls for 6.6 days and regularly aggregates up to 2.7" (69.6mm) of precipitation.

When does it start to snow in Dallas?

December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.3" (7.6mm) of snow.

What is the month with the shortest days in Dallas?

December has the shortest days of the year in Dallas, Texas, with an average of 10h of daylight.

How many hours of daylight does Dallas have in December?

In December, the average length of the day in Dallas is 10h.

What is the month with the least sunshine in Dallas?

The month with the least sunshine in Dallas is December, with an average of 5.6h of sunshine.

How long on average sun shines in December in Dallas?

The average sunshine in December is 5.6h.

What are the months with the lowest UV index in Dallas?

Months with the lowest UV index in Dallas, Texas, are January and December, with an average maximum UV index of 3.

How high is the UV index in December in Dallas?

In December, the average daily maximum UV index in Dallas is 3. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to the UV radiation.
Average temperature in December - Dallas, TX
  • Average high temperature in December: 57.5°F

The warmest month (with the highest average high temperature) is August (96.4°F).
The month with the lowest average high temperature is January (56.8°F).

  • Average low temperature in December: 38.5°F

The month with the highest average low temperature is August (76.8°F).
The coldest month (with the lowest average low temperature) is January (37.3°F).

Average humidity in December - Dallas, TX
  • Average humidity in December: 67.5%

The month with the highest relative humidity is May (69.7%).
The month with the lowest relative humidity is August (59.5%).

Average rainfall in December - Dallas, TX
  • Average rainfall in December: 2.7"

The wettest month (with the highest rainfall) is May (4.9").
The driest month (with the lowest rainfall) is August (1.9").

Average rainfall days in December - Dallas, TX
  • Average rainfall days in December: 6.6 days

The month with the highest number of rainy days is May (9.7 days).
The month with the lowest number of rainy days is August (4.6 days).

Average snowfall in December - Dallas, TX
  • Average snowfall in December: 0.3"

The month with the highest snowfall is February (0.6").
Months with the lowest snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December - Dallas, TX
  • Average snowfall days in December: 0.3 days

The month with the highest number of snowfall days is January (0.5 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in December / Average sunshine in December - Dallas, TX
  • Average daylight in December: 10h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in December: 5.6h

The month with most sunshine is July (Average sunshine: 10.7h).
The month with least sunshine is December (Average sunshine: 5.6h).

Average UV index in December - Dallas, TX
  • Average UV index in December: 3

Months with the highest UV index are May, June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).