Last updated: August 27, 2025
In San Juan, Mexico, the average temperature in June hovers around 25°C (78°F), providing a warm and inviting atmosphere. Expect temperatures to dip to a comfortable 18°C (64°F) at night, while daytime highs can reach up to 35°C (95°F). With 318 mm (12.5 in) of precipitation spread over 25 days, the month experiences a fair amount of rain. The air feels quite humid, with an average humidity of 80%, contributing to the lush surroundings.
In June in San Juan, the average temperature is 25°C (78°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 18°C (64°F). This pleasant climate makes it an ideal destination for travelers seeking comfortable temperatures for outdoor activities.
In San Juan in June, the precipitation amount is 318 mm (12.5 in), occurring over the course of 25 days.
In San Juan in June, humidity is 80%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket enveloping you, making every outdoor activity feel more strenuous and steaming, while also causing you to seek out shade and refreshment more frequently.
In San Juan in June, 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 Juan, you can check here.
UV Risk Categories
Weather in San Juan varies notably across the year, with each month offering distinct climate conditions. This page compares June’s weather to other months in San Juan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 22°C (71°F) | 2 mm (0.1 inches) | 70% | very high |
| February Weather | 23°C (74°F) | 3 mm (0.1 inches) | 65% | extreme |
| March Weather | 25°C (78°F) | 2 mm (0.1 inches) | 59% | extreme |
| April Weather | 27°C (80°F) | 0 mm (0.0 inches) | 60% | extreme |
| May Weather | 27°C (81°F) | 60 mm (2.4 inches) | 67% | extreme |
| June Weather | 25°C (78°F) | 318 mm (12.5 inches) | 80% | extreme |
| July Weather | 25°C (77°F) | 344 mm (13.5 inches) | 81% | extreme |
| August Weather | 24°C (76°F) | 445 mm (17.5 inches) | 83% | extreme |
| September Weather | 24°C (75°F) | 396 mm (15.6 inches) | 83% | extreme |
| October Weather | 24°C (75°F) | 231 mm (9.1 inches) | 80% | extreme |
| November Weather | 22°C (73°F) | 43 mm (1.7 inches) | 77% | very high |
| December Weather | 21°C (70°F) | 2 mm (0.1 inches) | 76% | very high |