Temperatures in December
It's pleasantly warm in December in San Antonio with an average temperature of 20°C. Temperatures this month range from a low of 17°C to a high of 23°C. At night, you can expect temperatures between 5°C and 12°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for San Antonio in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in San Antonio with mild temperatures, averaging around 21°C during the day and nights close to 10°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-December
By mid-December, the average daytime temperature drops to around 20°C, with nights close to 9°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
End of December
By the end of December, the average daytime temperature in San Antonio will be around 20°C, with nights close to 9°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.
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Precipitation in December
In December, there is an average of 45 mm of precipitation, spread over 5 days. Of the total precipitation, about 0,2 cm falls as snow in December. The wind speed is around 4 Bft, mostly coming from the Southeast.
The precipitation chance averages 15% per day this month. Though that seems low, there are also a few days with a higher chance of precipitation.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for San Antonio. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
San Antonio in December |
London | ||
|---|---|---|---|
 Average Temperature |
20°C | 9°C | |
 High Temp |
23°C | 11°C | |
| Low Temp |
17°C | 8°C | |
 Total Precipitation |
45 mm | 67 mm | |
| Rainy Days |
5 days | 10 days | |
 Total Snowfall |
0,2 cm | 1,2 cm | |
| Snowy Days |
1 day | 1 day | |
November
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is December a good time to visit San Antonio?
Want nice weather? Then December is a great time to be in San Antonio. You’ll have pleasant temperatures and not too much rain this month.
The hurricane season in San Antonio runs from June to November.
Temperature records for San Antonio in December
With 30°C, San Antonio hit the highest temperature in the last 10 years in December 2021. The lowest daytime temperature in this month was 1°C in 2022. The extreme night temperatures ranged from a low of -9°C to a high of 22°C.
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Daily Temperature in December in San Antonio
This chart shows the average daily temperatures, both day and night, for each day in December in San Antonio, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in San Antonio
The chart below shows the average daily precipitation in December for San Antonio, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 5 days of rain in San Antonio.
Daily Snowfall in December in San Antonio
This chart shows the average daily snowfall in December in San Antonio, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in December.
Daily UV Index in December in San Antonio
This chart shows the average daily UV index in December in San Antonio, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in December in San Antonio Over the Years
This chart shows the average temperature in December in San Antonio, measured in degrees Celsius, over the past years.
Total Precipitation in December in San Antonio Over the Years
This chart shows the average precipitation in December in San Antonio, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in December in San Antonio per year
This chart shows the average snowfall in December in San Antonio, measured in centimetres, over the past years.
Daily climate in December for San Antonio
Click on a specific day in December for detailed info on the typical weather on that day in San Antonio. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in San Antonio
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Average Weather in San Antonio by Month
Click on a month below to see detailed weather info for San Antonio. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of San Antonio for all months at once
