Last updated: August 27, 2025
In May, the average temperature in San Juan, Mexico hovers around 22°C (72°F). Expect a minimum temperature of 9°C (48°F) and a maximum of 35°C (95°F), offering a delightful range for visitors. Precipitation is relatively low, with an average of 19 mm (0.8 in) falling over 4 days. Additionally, the average humidity level is a comfortable 55%, making it an ideal time to explore!
In May, in San Juan, the average temperature is 22°C (72°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 9°C (48°F). This makes it a comfortable time to visit, ideal for outdoor activities and exploring the local sights.
In San Juan in May, the precipitation amount is 19 mm (0.8 in) over a span of 4 days.
In San Juan in May, humidity is 55%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, creating a pleasant and comfortable environment for traveling and exploring the area's attractions.
In San Juan in May, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. 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 May’s weather to other months in San Juan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 12°C (55°F) | 17 mm (0.7 inches) | 71% | very high |
| February Weather | 15°C (59°F) | 9 mm (0.3 inches) | 64% | extreme |
| March Weather | 18°C (65°F) | 5 mm (0.2 inches) | 49% | extreme |
| April Weather | 20°C (68°F) | 7 mm (0.3 inches) | 47% | extreme |
| May Weather | 22°C (72°F) | 19 mm (0.8 inches) | 55% | extreme |
| June Weather | 21°C (71°F) | 77 mm (3.0 inches) | 77% | extreme |
| July Weather | 20°C (68°F) | 120 mm (4.7 inches) | 82% | extreme |
| August Weather | 20°C (69°F) | 65 mm (2.6 inches) | 83% | extreme |
| September Weather | 18°C (65°F) | 119 mm (4.7 inches) | 86% | extreme |
| October Weather | 17°C (64°F) | 42 mm (1.7 inches) | 83% | extreme |
| November Weather | 15°C (59°F) | 15 mm (0.6 inches) | 80% | very high |
| December Weather | 13°C (55°F) | 12 mm (0.5 inches) | 83% | very high |