Dallas
Texas, USA
Long-term weather forecast
Long-term weather forecast
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December weather forecast and Climate
Dallas, TX

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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.
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  • The average high temperature in December: 14.2°C

The warmest month (with the highest average high temperature) is August (35.8°C).
The month with the lowest average high temperature is January (13.8°C).

  • The average low temperature in December: 3.6°C

The month with the highest average low temperature is August (24.9°C).
The coldest month (with the lowest average low temperature) is January (2.9°C).

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  • The 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%).

  • The average rainfall in December: 69.6mm

The wettest month (with the highest rainfall) is May (125mm).
The driest month (with the lowest rainfall) is August (47.5mm).

  • The 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).

  • The average snowfall in December: 7.6mm

The month with the highest snowfall is February (15.2mm).
Months with the lowest snowfall are April, May, June, July, August, September, October and November (0mm).

  • The 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).

  • The average daylight in December: 10h

Months with the longest days are May, June and July (Average daylight: 14h).
Months with shortest days are January, November and December (Average daylight: 10h).

  • The 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).

  • The 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).

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