Last updated: August 27, 2025
In December, the average temperature in San Antonio, Peru hovers around 26°C (79°F), creating a warm and inviting atmosphere. Expect a range from a minimum of 22°C (72°F) to a maximum of 34°C (94°F). While the weather is pleasant, be prepared for 320 mm (12.6 in) of precipitation spread over 29 days, contributing to an average humidity level of 87%. Make sure to pack accordingly!
In December in San Antonio, the average temperature is 26°C (79°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 22°C (72°F). This mild and warm climate makes San Antonio an ideal destination for travelers seeking pleasant weather.
In San Antonio in December, the precipitation amount is 320 mm (12.6 in) over the course of 29 days.
In San Antonio in December, humidity is 87%. With an average temperature of 26°C (79°F), this humidity feels like walking through a warm, thick blanket, making it essential to stay hydrated and take frequent breaks while exploring.
In San Antonio in December, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check 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 | 26°C (79°F) | 275 mm (10.8 inches) | 83% | extreme |
| February Weather | 26°C (79°F) | 278 mm (11.0 inches) | 78% | extreme |
| March Weather | 26°C (79°F) | 322 mm (12.7 inches) | 82% | extreme |
| April Weather | 26°C (79°F) | 322 mm (12.7 inches) | 85% | extreme |
| May Weather | 26°C (79°F) | 242 mm (9.5 inches) | 91% | extreme |
| June Weather | 26°C (78°F) | 184 mm (7.2 inches) | 85% | extreme |
| July Weather | 25°C (78°F) | 149 mm (5.9 inches) | 74% | extreme |
| August Weather | 26°C (79°F) | 120 mm (4.7 inches) | 59% | extreme |
| September Weather | 26°C (80°F) | 170 mm (6.7 inches) | 55% | extreme |
| October Weather | 26°C (80°F) | 202 mm (8.0 inches) | 57% | extreme |
| November Weather | 26°C (80°F) | 239 mm (9.4 inches) | 74% | extreme |
| December Weather | 26°C (79°F) | 320 mm (12.6 inches) | 87% | extreme |