Last updated: August 31, 2025
In San Antonio, Puerto Rico, the average temperature in October is a warm 27°C (81°F). Expect lows of 24°C (76°F) and highs reaching up to 31°C (88°F). Throughout the month, 127 mm (5.0 in) of precipitation typically falls over 21 days, contributing to an average humidity of 78%. Be prepared for a lush and vibrant atmosphere!
In October in San Antonio, the average temperature is 27°C (81°F), with a maximum that can reach 31°C (88°F) and a minimum that can be as low as 24°C (76°F). This mild and pleasant climate makes San Antonio an ideal destination for travelers seeking comfort and warmth during this time of year.
In San Antonio in October, the total precipitation amount reaches 127 mm (5.0 in) over the course of 21 days.
In San Antonio in October humidity is 78%. With an average temperature of 27°C (81°F), this humidity feels like a warm, heavy embrace that makes traveling feel both invigorating and exhausting. Moments spent outside can quickly become clammy and uncomfortable, urging travelers to seek shade and hydration as they explore.
In San Antonio in October, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. 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 October’s weather to other months in San Antonio, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 25°C (77°F) | 34 mm (1.3 inches) | 76% | very high |
| February Weather | 25°C (76°F) | 39 mm (1.5 inches) | 75% | extreme |
| March Weather | 25°C (76°F) | 72 mm (2.8 inches) | 74% | extreme |
| April Weather | 25°C (78°F) | 66 mm (2.6 inches) | 75% | extreme |
| May Weather | 26°C (79°F) | 97 mm (3.8 inches) | 75% | extreme |
| June Weather | 27°C (81°F) | 85 mm (3.3 inches) | 77% | extreme |
| July Weather | 27°C (81°F) | 91 mm (3.6 inches) | 80% | extreme |
| August Weather | 27°C (82°F) | 97 mm (3.8 inches) | 80% | extreme |
| September Weather | 27°C (81°F) | 188 mm (7.4 inches) | 79% | extreme |
| October Weather | 27°C (81°F) | 127 mm (5.0 inches) | 78% | extreme |
| November Weather | 26°C (79°F) | 99 mm (3.9 inches) | 78% | very high |
| December Weather | 25°C (78°F) | 43 mm (1.7 inches) | 76% | very high |