San Isidro Weather & Climate: Best Time to Visit

The climate in San Isidro experiences moderate temperature changes, with mild shifts between seasons. Average maximum daytime temperatures range from a comfortable 26°C (79°F) in August, the warmest time of the year, to a pleasant 18°C (64°F) during cooler months like January.

At night, you can expect temperatures ranging from 21°C (70°F) in August to around 14°C (57°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

San Isidro tends toward drier weather patterns, receiving approximately 348 mm (14 in) of rain per year. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives moderate rainfall, averaging 52 mm (2 in) of precipitation, recorded across 6 rainy days. In contrast, the driest month July brings less rainfall, with 2 mm (0.1 in) over a single rainy day. For more details, please visit our San Isidro 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 Isidro. While July receives considerable daily sunshine with up to 11.1 hours, December marks the darkest time of the year, where sunshine is scarce with only 5.7 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

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

The city experiences its highest humidity in November, reaching 66%. In July, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year