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
December, the first month of the winter, in Dallas, is still a mild month, with average temperature ranging between min 41.7°F (5.4°C) and max 55.6°F (13.1°C).

Temperature

In December, the average high-temperature drops, from an enjoyable 64.6°F (18.1°C) in November, to a moderate 55.6°F (13.1°C). In Dallas, Texas, the average low-temperature is 41.7°F (5.4°C).

Humidity

In Dallas, the average relative humidity in December is 68%.

Rainfall

In Dallas, during 8.8 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. In Dallas, during the entire year, the rain falls for 141.2 days and collects up to 30.12" (765mm) of precipitation.

Snowfall

January, February, November and December are months with snowfall. In Dallas, Texas, in December, snow falls for 0.4 days, with typically accumulated 0.08" (2mm) of snow. In Dallas, during the entire year, snow falls for 2.2 days, and aggregates up to 0.71" (18mm) of snow.

Daylight

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

Sunshine

December has the least sunshine of the year in Dallas, Texas, with an average of 5.6h of sunshine.

UV index

Months with the lowest UV index are January and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 3 in December interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Dallas?

In December, in Dallas, the average high-temperature is 55.6°F (13.1°C), and the average low-temperature is 41.7°F (5.4°C).

What is the average humidity in December in Dallas?

The average relative humidity in December in Dallas, Texas, is 68%.

How many days does it rain in December in Dallas?

In Dallas, Texas, in December, during 8.8 rainfall days, 1.89" (48mm) of precipitation is typically accumulated.

How many days does it snow in December in Dallas?

In Dallas, Texas, in December, snow falls for 0.4 days, with typically accumulated 0.08" (2mm) of snow.

What is the month with the shortest days in Dallas?

The month with the shortest days is December, with an average of 10h of daylight.

What is the average length of the day in December in Dallas?

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

What is the month with the least sunshine in Dallas?

December has the least sunshine of the year in Dallas, Texas, with an average of 5.6h of sunshine.

How long on average sun shines in December in Dallas?

In December, the average sunshine is 5.6h.

When is the lowest UV index in Dallas?

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

What is the UV index reading in December in Dallas?

The average daily maximum UV index in December in Dallas is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.
Average temperature in December - Dallas, TX
  • Average high temperature in December: 55.6°F

The warmest month (with the highest average high temperature) is August (96.1°F).
The month with the lowest average high temperature is January (54.3°F).

  • Average low temperature in December: 41.7°F

The month with the highest average low temperature is August (77.2°F).
The coldest month (with the lowest average low temperature) is January (39.2°F).

Average humidity in December - Dallas, TX
  • Average humidity in December: 68%

The month with the highest relative humidity is May (72%).
The month with the lowest relative humidity is August (55%).

Average rainfall in December - Dallas, TX
  • Average rainfall in December: 1.89"

The wettest month (with the highest rainfall) is May (4.13").
The driest month (with the lowest rainfall) is February (1.61").

Average rainfall days in December - Dallas, TX
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is May (15.8 days).
The month with the lowest number of rainy days is January (6.7 days).

Average snowfall in December - Dallas, TX
  • Average snowfall in December: 0.08"

The month with the highest snowfall is February (0.43").
Months with the lowest snowfall are March, April, May, June, July, August, September and October (0").

Average snowfall days in December - Dallas, TX
  • Average snowfall days in December: 0.4 days

The month with the highest number of snowfall days is February (1.2 days).
Months with the lowest number of snowfall days are March, 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 August (Average sunshine: 11.1h).
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 7).
Months with the lowest UV index are January and December (UV index 3).