Last updated: June 24, 2025
In San Antonio Heights, United States, the average temperature in December hovers around 10°C (50°F), with a potential minimum of 0°C (33°F) and highs reaching 25°C (77°F). Expect approximately 79 mm (3.1 in) of precipitation over 5 days, accompanied by an average humidity level of 76%, creating a humid yet temperate climate.
In December in San Antonio Heights, the average temperature is 10°C (50°F). Maximum temperatures can reach 25°C (77°F), while the minimum can dip as low as 0°C (33°F). This climate is ideal for travelers seeking mild weather and the opportunity to enjoy a variety of outdoor activities.
In San Antonio Heights in December, the precipitation amount is 79 mm (3.1 in) over a span of 5 days.
In San Antonio Heights in December, humidity is 76%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill that seeps through your clothes, making outdoor activities quite uncomfortable and necessitating a layer of warmth for traveling.
In San Antonio Heights in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in San Antonio Heights for better planning.
UV Risk Categories
Weather in San Antonio Heights varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Antonio Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 10°C (50°F) | 77 mm (3.0 inches) | 78% | moderate |
| February Weather | 10°C (50°F) | 73 mm (2.9 inches) | 82% | high |
| March Weather | 11°C (53°F) | 79 mm (3.1 inches) | 75% | very high |
| April Weather | 15°C (59°F) | 25 mm (1.0 inches) | 68% | very high |
| May Weather | 17°C (62°F) | 20 mm (0.8 inches) | 57% | extreme |
| June Weather | 21°C (71°F) | 3 mm (0.1 inches) | 52% | extreme |
| July Weather | 25°C (77°F) | 6 mm (0.2 inches) | 46% | extreme |
| August Weather | 25°C (77°F) | 9 mm (0.4 inches) | 39% | extreme |
| September Weather | 23°C (73°F) | 6 mm (0.2 inches) | 48% | very high |
| October Weather | 18°C (65°F) | 11 mm (0.4 inches) | 59% | high |
| November Weather | 14°C (58°F) | 25 mm (1.0 inches) | 72% | moderate |
| December Weather | 10°C (50°F) | 79 mm (3.1 inches) | 76% | moderate |