Last updated: August 27, 2025
In San Juan, Mexico, the average temperature in April is a pleasant 25°C (78°F). However, be prepared for temperature fluctuations; it can dip to a chilly 8°C (46°F) or soar up to a scorching 42°C (108°F). During this month, you can expect about 46 mm (1.8 in) of precipitation over 6 days, contributing to an average humidity of 81%. Stay hydrated and enjoy the diverse weather!
In April in San Juan, the average temperature is 25°C (78°F). Maximums can reach 42°C (108°F), while minimums can dip as low as 8°C (46°F). Be prepared for a wide range of temperatures when traveling during this time!
In San Juan in April, the precipitation amount is 46 mm (1.8 in) over a span of 6 days.
In San Juan in April humidity is 81%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities less comfortable and requiring frequent breaks to stay hydrated.
In San Juan in April, 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 April’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 |