Last updated: June 24, 2025
In August, the average temperature in San Marcos, United States is a delightful 24°C (75°F). Expect comfortable days, with temperatures ranging from a refreshing 16°C (62°F) at night to a warm 34°C (94°F) during the day. With just 1 mm (0.1 in) of precipitation over 0 days, your plans are unlikely to be interrupted. Enjoy the average humidity of 42%, making for a pleasant atmosphere throughout the month!
In August in San Marcos, the average temperature is 24°C (75°F). Maximums can reach 34°C (94°F), while minimums can be as low as 16°C (62°F). This pleasant climate makes it an ideal destination for travelers looking to enjoy warm weather and outdoor activities.
In San Marcos in August, the precipitation amount is 1 mm (0.1 in) during 0 days, indicating a very dry period.
In San Marcos in August humidity is 42%. With an average temperature of 24°C (75°F), this humidity feels like a comfortable and pleasant environment for traveling, allowing you to explore the sights without feeling overly sticky or fatigued.
In San Marcos in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in San Marcos.
UV Risk Categories
Weather in San Marcos varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in San Marcos, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 13°C (56°F) | 70 mm (2.8 inches) | 72% | moderate |
| February Weather | 13°C (56°F) | 78 mm (3.1 inches) | 77% | high |
| March Weather | 14°C (58°F) | 68 mm (2.7 inches) | 67% | very high |
| April Weather | 16°C (62°F) | 32 mm (1.3 inches) | 56% | very high |
| May Weather | 17°C (63°F) | 24 mm (0.9 inches) | 46% | extreme |
| June Weather | 20°C (68°F) | 3 mm (0.1 inches) | 48% | extreme |
| July Weather | 23°C (73°F) | 4 mm (0.2 inches) | 46% | extreme |
| August Weather | 24°C (75°F) | 1 mm (0.1 inches) | 42% | very high |
| September Weather | 23°C (73°F) | 5 mm (0.2 inches) | 52% | very high |
| October Weather | 20°C (69°F) | 12 mm (0.5 inches) | 58% | high |
| November Weather | 17°C (63°F) | 34 mm (1.4 inches) | 66% | moderate |
| December Weather | 14°C (57°F) | 70 mm (2.7 inches) | 74% | moderate |