San Marcos Weather & Climate: Best Time to Visit

In San Marcos temperatures are generally consistent throughout the year. Average maximum daytime temperatures range from a very warm 35°C (95°F) in April, the warmest time of the year, to a very warm 31°C (88°F) during cooler months like January.

At night, you can expect temperatures ranging from 24°C (75°F) in April to around 22°C (72°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

San Marcos experiences significant rainfall throughout the year, averaging 1544 mm (61 in) of precipitation annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, October it receives heavy rainfall, averaging 297 mm (12 in) of precipitation, recorded across 22 rainy days. In contrast, the driest month February brings less rainfall, with 4.5 mm (0.2 in) over 4 rainy days. For more details, please visit our San Marcos Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in San Marcos. While March receives considerable daily sunshine with up to 9.7 hours, July marks the darkest time of the year, where sunshine is scarce with only 5.1 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in San Marcos.

The city experiences its highest humidity in September, reaching 82%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year