San Antonio Weather in December: Temperature, Precipitation, Wind
San Antonio, Texas experiences mild winters, with December marking the transition into cooler temperatures. The average temperature in December hovers around 14.1°C (57.4°F), providing comfortable conditions for outdoor activities at popular attractions like the River Walk and the Alamo.
Daytime temperatures in San Antonio reach a pleasant 20.7°C (69.2°F) on average. Visitors and locals alike enjoy exploring the city’s historic missions or strolling through the San Antonio Botanical Garden during these warm afternoons. Nighttime temperatures drop to an average low of 8.1°C (46.7°F), prompting residents to don light jackets or sweaters.
Humidity levels in December average 65.1%, contributing to the overall comfort of the city’s climate. Precipitation is relatively low, with an average of 0.48 inches (12.2 mm) of rainfall throughout the month. Rain occurs on approximately 7 days, with a 22.6% probability of precipitation on any given day.
Cloud cover in San Antonio during December averages 41.2%, allowing for ample sunshine. The average UV index of 5.3 indicates moderate sun intensity, making sun protection advisable for extended outdoor activities. Visibility remains excellent at 15.1 kilometers (9.4 miles), offering clear views of the city’s skyline and surrounding Hill Country.
Wind speeds in December average 18.9 km/h (11.7 mph), with gusts reaching up to 32.0 km/h (19.9 mph). These breezy conditions contribute to the city’s comfortable feel, especially on warmer afternoons. Atmospheric pressure averages 1019.6 hPa, indicating stable weather patterns.
December days in San Antonio are shorter, with sunrise occurring around 7:20 AM and sunset at approximately 5:38 PM. The shorter daylight hours coincide with the festive holiday season, when the city’s famous River Walk is adorned with twinkling lights and decorations.
San Antonio’s December weather provides ideal conditions for exploring outdoor attractions like the San Antonio Zoo or enjoying a round of golf at one of the city’s numerous courses. The mild temperatures and low precipitation make it an attractive destination for winter travelers seeking respite from colder climates.
What is the temperature in San Antonio in December?
Average air temperature in San Antonio is 14.1°C (57.4°F) in December. The outside temperature in San Antonio feels like 13.9°C (57.1°F) on a typical December day. The highest average temperature during sunny days is 20.7°C (69.2°F) and feels like 20.7°C (69.2°F). The lowest average temperature after dark is 8.1°C (46.7°F) which feels like 7.6°C (45.7°F).
How hot is San Antonio in December?
The hot temperature in December in San Antonio rises to 26.8°C (80.2°F) on sunny days with low cloud coverage and 65.1% humidity. During hottest days of December it feels like 26.8 °C (80.2°F). The average maximum temp in San Antonio is 20.7°C (80.2°F) during day time in December.
How cold is San Antonio in December?
The coldest temp in San Antonio in December drops to -0.5°C (31.1°F) during the cold nights. With 18.9km/h (11.8mph) winds and 65.1% humidity it feels like -1.8°C (28.8°F) on the coldest nights. The average minimum temperature is 8.1°C (46.7°F) during night time in December.
Does it rain in San Antonio in December?
Yes, it rains for 7 days in San Antonio, United States in December averaging 0.48 mm of precipitation. San Antonio has a 22.6% chance for rain throughout the entire month of December.
How much does it rain in San Antonio throughout December?
San Antonio has 0.48 mm (0.02 inch) of rain per day on average in December. It rains for an average of 7 days out of the entire month.
Is San Antonio windy in December?
The average speed of wind in San Antonio, United States during December is 18.9km/h (11.8mph) and average windgust is 32km/h (19.9mph). On some days in December wind can reach up to 31.7km/h (19.7mph).
What is the direction of the wind in San Antonio in December?
Most days of December the wind is blowing from South direction in San Antonio.
What are the humidity levels in San Antonio in December?
The average humidity levels in San Antonio in December are 65.1%. Daily humidity levels in San Antonio range from 31.7% to 91.5% during December.
How many hours of daylight are in San Antonio in December?
San Antonio has 10 hours 17 minutes of daylight in December on average. Sunset and sunrise times gradually change throughout the month. Sunrise in San Antonio in December is at 7:20:57 and the sunset is at 17:38:34.
What is the cloud coverage in San Antonio in December?
Clouds cover 41.2% of the sky on average throughout December in San Antonio. The cloud coverage ranges from 2.4% to 99.2% depending on the day of the month.
What is the UV level in December in San Antonio?
The average UV index in San Antonio is 5.3 in December. UV levels change throughout the month and range from 1 to 7.
What is the solar radiation in San Antonio in December?
The average solar radiation is 123.3 W/m2 (Watts per square meter) in San Antonio during December. However solar radiation levels change throughout the month and range from 22.3 W/m2 to 173.3 W/m2.
What is the solar energy during December in San Antonio?
The average solar energy during December in San Antonio is 10.7 MJ/m2 (megajoules per square metre). Solar energy ranges from 1.9 MJ/m2, to 15 MJ/m2 during December.
Are there severe weather risks in San Antonio in December?
Yes, there is a 10% risk for severe weather in San Antonio, United States in December.
What is the air pressure in San Antonio in December?
On average the air pressure in San Antonio in December is 1019.6 mb (millibars). Throughout the month the sea level pressure ranges from 1010 mb to 1026.4 mb.
What is the visibility in San Antonio in December?
The average daylight visibility in San Antonio in December is 15.1 km (9.4 miles). Depending on the precipitation the visibility ranges from 8.9 km (5.5 miles) to 16 km (9.9 miles) throughout December.
What is the dew point in San Antonio in December?
The average dew point in San Antonio during December is 6.6°C (44°F).
Where is the data for San Antonio climate in December coming from?
The climate data for San Antonio, Texas, United States in December is collected from the following weather stations.
- SAN ANTONIO STINSON MUNICIPAL AIRPORT, TX US
- SAN ANTONIO INTERNATIONAL AIRPORT, TX US
- SAN ANTONIO KELLY FIELD AFB, TX US
- FW6098 San Antonio TX US
- KSAT
- KSKF
- KSSF