Austin Weather in December

December usually brings the first frosts of the season to Austin, Texas. Most days though, Austin basks in mild weather.

This page gives detailed information on the typical December weather for Austin.

You can jump directly to data and descriptions for:

The numbers here are historical averages based on climate data gathered at Camp Mabry, located at few miles from downtown Austin.

Temperature Weather iconTemperature

63 °F December average high 17 °C
42 °F December average low 6 °C

In most years, Austin averages a daily maximum temperature for December that's between 59 and 67 degrees Fahrenheit (15 to 19 degrees Celsius). The minimum temperature usually falls between 38 and 46 °F (4 to 8 °C).

The days at Austin cool steadily during December. By the end of the month, the temperature has dropped around 5 °F (3 °C) below what it was at the start.

19 days 60 °F max. or more (16 °C)
13 days 40 °F min. or less (4 °C)

On most December days, Austin warms up to over 50 °F (10 °C). The city averages 9 days this month when the thermometer reaches into the 70s °F (over 21 °C). Occasionally the temperature does get as high as 80 °F (27 °C) this time of year.

The thermometer dips to freezing or below on an average of 4 nights. But December rarely gets as cold as 20 °F (-8 °C).

Rainy Weather iconRain

2.4 in total precipitation 61 mm
8 days of rain

Half the time, Austin receives 0.5 to 3 inches (13 to 84 mm) of rainfall in December. One in four years has drier weather, while another one in four is wetter. None of the precipitation normally falls as snow.

Sunny Weather iconSun

49 % sunshine
10 days clear skies

December is one of the cloudiest months at Austin. Even so, half the time the weather is sunny. The sun's rays reach the ground during 49 percent of daylight hours on average, for a total of 155 hours in the month. Typically on 10 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in December at Austin averages 10 hours and 13 minutes a day. The shortest days of the year, from around December 16th to 26th, last 10 hours and 12 minutes from sunrise to sunset.

Humid Weather iconHumidity

68 % December average humidity

The relative humidity in Austin during December usually peaks at 80 percent in the morning then drops to 52 percent by mid afternoon.

Local Time12 am3 am6 am9 am12 pm3 pm6 pm9 pm
Humidity % 73 77 80 75 59 52 58 68

Windy Weather iconWind

8.2 mph December wind speed average 13.2 kph

December is less windy than most other months in Austin.

Stormy Weather iconStorms

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

In some Decembers, Austin doesn't see a thunderstorm.


These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity and thunderstorm statistics are 1961-1990 normals.

Austin Weather
Back to Top