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Average weather for San Antonio 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.

Daily Temperature in December in San Antonio

Start of December

The month of December starts in San Antonio with mild temps, averaging around 21°C during the day and nights around 10°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.

Mid December

By mid-December, daytime temps drop to around 20°C, with nights around 9°C. Not much precipitation expected during this period. It’s mostly dry and sunny.

End of December

By the end of December, the average daytime temperature in San Antonio is around 20°C, while nighttime temps are about 9°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.

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.

San Antonio in December

New York
Temperature Average temperature
20°C 9°C
Sun Max. temperature
23°C 12°C
Sun Min. temperature
17°C -5°C
Rain Total precipitation
45 mm 133 mm
Rain Rainy days
5 days 17 days
Snow Total snowfall
0,2 cm 9,7 cm
Snow Snowy days
1 day 3 days

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?

Looking for great weather? December is a good time to be in San Antonio. The temperatures are nice, and there’s not too much rain.

The hurricane season in San Antonio runs from June to November.

Temperature records

With 30°C in 2021, San Antonio reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 1°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of -9°C to a highest value of 22°C.

Check out the climate of San Antonio for all months and discover the best travel time

Daily Temperature in December in San Antonio

This chart shows the average daily high and low temperatures in December for San Antonio, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.

Daily Temperature in December in San Antonio

Daily Precipitation in December in San Antonio

The chart below shows the average daily precipitation in December for San Antonio, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for December, you can expect about 5 days of precipitation in San Antonio.

Daily Precipitation in December in San Antonio

Daily Snowfall in December in San Antonio

This chart shows the average daily snowfall in December in San Antonio, measured in centimeters. 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 Snowfall in December in San Antonio

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.

Daily UV Index in December in San Antonio

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 few years.

Temperature in December in San Antonio Over the Years

Total precipitation in December in San Antonio over the years

This chart shows the average precipitation in December in San Antonio, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.

Precipitation in December in San Antonio over the years

Snowfall in December in San Antonio per year

This chart shows the average snowfall in December in San Antonio, measured in centimeters, over the past few years.

Snowfall in December in San Antonio over the past years

Daily weather in December for San Antonio

Click on any day in December to get detailed info about the usual 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

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