Weather in San Antonio in December 2024
Average weather
Average temperature in San Antonio in December
Going from a maximum of +81°F during the day to a minimum of +32°F during the night, the temperature in December averages around +70°F.
The average maximum temperature goes down 4% by the end of the month, compared with the beginning of the month, from +75°F to +73°F.
Is San Antonio warm or cold in December?
San Antonio is typically mild in December.
Maximum temperatures go down compared to the previous month from +73°F to +66°F. The minimum temperature also goes down from +54°F to +46°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
December is one of the coolest months in San Antonio, here is the comparison with other months:
Climate in San Antonio in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +73°F | +66°F | +64°F | ||||
| Min. temperature | ||||||
| +25°F | +9°F | +16°F | ||||
| Max. temperature | ||||||
| +93°F | +86°F | +86°F | ||||
| Rainfall | ||||||
| 67 mm | 53 mm | 49 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 71% | 71% | 70% | ||||
| Air pressure | ||||||
| 1018 HPa | 1019 HPa | 1019 HPa | ||||
| Sunny days | ||||||
| 10 | 10 | 10 | ||||
| Cloudy days | ||||||
| 9 | 9 | 9 | ||||
| Rainy days | ||||||
| 12 | 11 | 11 | ||||
| Snowy days | ||||||
| 0 | 0 | 1 | ||||
December weather is still as good as in November. It’s getting colder in December. From +73°F in the day, the average maximum temperature lowers to +66°F. As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 67 mm to 53 mm. Humidity levels don’t change as the month goes on, averaging around 71%. The average wind speed doesn’t change much during December, staying around 3 m/s. The amount of sunny days stay about the same, averaging 10 sunny days during the month.
January brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in San Antonio is gradually decreasing during December, going from 3 m/s to 2 m/s over the course of the month.
Rain
How was the weather last December in San Antonio?
Climate Change Over the Years
The climate in San Antonio in December has not changed that much over the last 43 years.
The average temperature was the lowest in 1983 (+77°F) and the highest in 2006 (+85°F). The driest year was 1996 with only 401 mm of rainfall, and the wettest year was 2007 with 1606 mm.
FAQ
Is December a good time to visit San Antonio?
Can you sunbathe in San Antonio in December?
Is San Antonio rainy in December?
Is it sunny in San Antonio in December?
Other cities in USA
Monthly weather in San Antonio
Source of the data
For this page, we’ve looked at the typical weather in San Antonio, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.