Last updated: August 27, 2025
In San Antonio, Peru, the average temperature in December hovers around 18°C (65°F). You can expect a minimum of 12°C (54°F) and a comfortable maximum of 25°C (78°F). Expect about 13 mm (0.5 in) of precipitation spread across 2 days, and enjoy an average humidity of 84%.
In December in San Antonio, the average temperature is 18°C (65°F). Maximums can reach 25°C (78°F), and minimums can be as low as 12°C (54°F). This mild climate makes San Antonio an ideal destination for travelers looking to enjoy comfortable weather.
In San Antonio in December, the precipitation amount is 13 mm (0.5 in) over a span of 2 days.
In San Antonio in December, humidity is 84%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and slightly uncomfortable as the air clings to your skin and limits your breath.
In San Antonio in December, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in San Antonio.
UV Risk Categories
Weather in San Antonio varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Antonio, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 18°C (64°F) | 83 mm (3.3 inches) | 89% | extreme |
February Weather | 18°C (64°F) | 89 mm (3.5 inches) | 90% | extreme |
March Weather | 18°C (64°F) | 57 mm (2.3 inches) | 90% | extreme |
April Weather | 18°C (65°F) | 8 mm (0.3 inches) | 91% | extreme |
May Weather | 18°C (65°F) | 0 mm (0.0 inches) | 88% | extreme |
June Weather | 17°C (63°F) | 0 mm (0.0 inches) | 76% | very high |
July Weather | 17°C (63°F) | 1 mm (0.0 inches) | 61% | very high |
August Weather | 18°C (64°F) | 0 mm (0.0 inches) | 57% | extreme |
September Weather | 18°C (65°F) | 0 mm (0.0 inches) | 58% | extreme |
October Weather | 18°C (65°F) | 1 mm (0.0 inches) | 75% | extreme |
November Weather | 18°C (64°F) | 4 mm (0.1 inches) | 83% | extreme |
December Weather | 18°C (65°F) | 13 mm (0.5 inches) | 84% | extreme |