San José Weather & Climate: Best Time to Visit

The climate in San José is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 28°C (82°F) in August to a moderate 16°C (61°F) in January.

Nighttime temperatures range from 24°C (75°F) in August to 12°C (54°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

San José has a relatively dry climate with low precipitation, averaging 253 mm (10 in) of rainfall annually. The seasons in San José bring significant changes in precipitation. The wettest month, November, receives moderate rainfall, with an average of 33 mm (1.3 in) of precipitation. This rainfall is distributed across 10 rainy days.

In contrast, the driest month, July, experiences much less rainfall, totaling 0.9 mm (0.04 in) over 2 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our San José Precipitation page.

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

The average number of days each month with precipitation

In San José, summer days are longer and more sunny, with daily sunshine hours peaking at 11.4 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 5.9 hours per average 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 José.

The city experiences its highest humidity in October, reaching 68%. In July, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year