Last updated: August 27, 2025
In March, the average temperature in San Marcos, Mexico hovers around 19°C (67°F). Expect a temperature range from a cool 8°C (47°F) to a warm 32°C (90°F). This month typically sees about 33 mm (1.3 in) of precipitation spread over 8 days, with an average humidity level of 59%. Whether you're planning outdoor adventures or cozy indoor activities, be prepared for a mix of pleasant warmth and occasional showers!
In March in San Marcos, the average temperature is 19°C (67°F). Maximums can reach 32°C (90°F) and minimums can be as low as 8°C (47°F). This mild climate makes San Marcos an ideal destination for outdoor activities and sightseeing during this time of year.
In San Marcos in March, the precipitation amount is 33 mm (1.3 in) during a span of 8 days.
In San Marcos in March humidity is 59%. With an average temperature of 19°C (67°F), this humidity feels like a gentle embrace that can be refreshing during sightseeing but may feel a bit sticky if you're on the move for extended periods.
In San Marcos in March, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Marcos, you can check here.
UV Risk Categories
Weather in San Marcos varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in San Marcos, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 17°C (63°F) | 89 mm (3.5 inches) | 84% | very high |
| February Weather | 18°C (65°F) | 54 mm (2.1 inches) | 73% | extreme |
| March Weather | 19°C (67°F) | 33 mm (1.3 inches) | 59% | extreme |
| April Weather | 22°C (71°F) | 58 mm (2.3 inches) | 52% | extreme |
| May Weather | 22°C (72°F) | 150 mm (5.9 inches) | 53% | extreme |
| June Weather | 21°C (71°F) | 286 mm (11.2 inches) | 55% | extreme |
| July Weather | 21°C (70°F) | 93 mm (3.7 inches) | 61% | extreme |
| August Weather | 21°C (70°F) | 169 mm (6.6 inches) | 71% | extreme |
| September Weather | 21°C (70°F) | 234 mm (9.2 inches) | 77% | extreme |
| October Weather | 20°C (69°F) | 285 mm (11.2 inches) | 78% | extreme |
| November Weather | 19°C (66°F) | 143 mm (5.6 inches) | 82% | very high |
| December Weather | 17°C (63°F) | 83 mm (3.3 inches) | 86% | very high |