Last updated: August 27, 2025
In San Juan, Mexico, the average temperature in June reaches a warm 30°C (86°F). You can expect a minimum of 20°C (68°F) and temperatures soaring to a maximum of 44°C (111°F) during this time. With an average precipitation amount of 86 mm (3.4 in) spread over 9 days, the average humidity floats around 74%, creating a tropical atmosphere.
In June in San Juan, the average temperature is 30°C (86°F). The maximum can reach 44°C (111°F), while the minimum can be as low as 20°C (68°F). Be prepared for hot days and warm evenings, making it an ideal time for beach outings and outdoor adventures.
In San Juan in June, the precipitation amount is 86 mm (3.4 in), falling over the course of 9 days.
In San Juan in June, humidity is 74%. With an average temperature of 30°C (86°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling and exhausting, so travelers should stay hydrated and plan for frequent breaks in the shade.
In San Juan in June, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Juan.
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 | 16°C (61°F) | 20 mm (0.8 inches) | 84% | high |
| February Weather | 18°C (65°F) | 13 mm (0.5 inches) | 83% | very high |
| March Weather | 23°C (73°F) | 25 mm (1.0 inches) | 78% | very high |
| April Weather | 25°C (78°F) | 46 mm (1.8 inches) | 81% | extreme |
| May Weather | 28°C (83°F) | 86 mm (3.4 inches) | 82% | extreme |
| June Weather | 30°C (86°F) | 86 mm (3.4 inches) | 74% | extreme |
| July Weather | 31°C (87°F) | 78 mm (3.1 inches) | 68% | extreme |
| August Weather | 31°C (89°F) | 16 mm (0.6 inches) | 67% | extreme |
| September Weather | 28°C (83°F) | 119 mm (4.7 inches) | 75% | extreme |
| October Weather | 24°C (76°F) | 56 mm (2.2 inches) | 78% | very high |
| November Weather | 20°C (68°F) | 23 mm (0.9 inches) | 83% | high |
| December Weather | 17°C (64°F) | 20 mm (0.8 inches) | 86% | high |