Last updated: June 24, 2025
In May, the average temperature in San Juan Capistrano, United States is a comfortable 16°C (62°F). You can expect minimums around 11°C (52°F) and maximums reaching up to 25°C (78°F). During this month, there is a total precipitation of approximately 14 mm (0.5 in) spread over about 4 days, with an average humidity of 70%. Enjoy the variable weather while exploring!
In May in San Juan Capistrano, the average temperature is 16°C (62°F). Maximum temperatures can reach 25°C (78°F), while minimums can drop as low as 11°C (52°F). This mild climate makes it an ideal time for outdoor exploration and sightseeing.
In San Juan Capistrano in May, the precipitation amount is 14 mm (0.5 in) over a span of 4 days.
In San Juan Capistrano in May, humidity is 70%. With an average temperature of 16°C (62°F), this humidity feels like a cool, damp blanket wrapping around you, making outdoor activities a bit uncomfortable and prompting travelers to seek shade or indoor attractions to avoid the sticky air.
In San Juan Capistrano in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Juan Capistrano.
UV Risk Categories
Weather in San Juan Capistrano varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in San Juan Capistrano, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 14°C (58°F) | 60 mm (2.3 inches) | 74% | moderate |
| February Weather | 14°C (57°F) | 55 mm (2.2 inches) | 79% | high |
| March Weather | 14°C (58°F) | 54 mm (2.1 inches) | 75% | very high |
| April Weather | 16°C (61°F) | 25 mm (1.0 inches) | 70% | very high |
| May Weather | 16°C (62°F) | 14 mm (0.5 inches) | 70% | extreme |
| June Weather | 18°C (65°F) | 3 mm (0.1 inches) | 72% | extreme |
| July Weather | 21°C (70°F) | 3 mm (0.1 inches) | 73% | extreme |
| August Weather | 22°C (71°F) | 3 mm (0.1 inches) | 69% | very high |
| September Weather | 21°C (70°F) | 3 mm (0.1 inches) | 68% | very high |
| October Weather | 20°C (68°F) | 9 mm (0.4 inches) | 67% | high |
| November Weather | 17°C (63°F) | 22 mm (0.8 inches) | 68% | moderate |
| December Weather | 14°C (58°F) | 69 mm (2.7 inches) | 71% | moderate |