San Antonio Weather in December
What's the weather like in San Antonio (Heredia) in December 2024?
The climate in San Antonio during December can be summarized as warm, humid and very dry.
December is in the winter in San Antonio and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 19°C (66°F) is normal.
| Daytime temperature | 26.7°C 80.1°F |
|---|---|
| Nightly temperature | 19.1°C 66.4°F |
| Average temperature | 22.9°C 73.2°F |
| Daily sunshine | 7.6 hrs |
| Avg rainfall | 6 mm 0.2 ins |
| Rainy days | 15 days |
| Sea temperature | 28°C 82.5°F |
| Humidity | 77% |
| Windspeed | 19.1kph 12 mph |
On average December is the 3rd driest month of the year in San Antonio with around 6mm 0.2 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 7.6 hours of sunshine per day.
December temperatures in San Antonio
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Antonio in December 2024.
Other monthly averages
Best places to visit in December
San Antonio weather stats
| Hottest month: | April | 28.6°C 83.5°F |
|---|---|---|
| Driest month: | January | 0mm 0ins |
| Sunniest month: | February | 8.9hrs |
| Coldest month: | October | 26.2°C 79.2°F |
| Wettest month: | September | 332mm 13.1ins |
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