Last updated: August 22, 2025
In San Luis, Argentina, the average temperature in May hovers around 13°C (55°F). Expect a minimum of -2°C (29°F) and a maximum of 31°C (88°F), providing a wide range of experiences. During this month, you can anticipate 32 mm (1.2 in) of precipitation over approximately 4 days, with the air carrying an average humidity of 67%. Whether you're bracing for a chilly morning or a warm afternoon, be prepared for a mix of weather!
In May in San Luis, the average temperature is 13°C (55°F). The maximum can reach 31°C (88°F), and the minimum can be as low as -2°C (29°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In San Luis in May, the total precipitation amount is 32 mm (1.2 in) over a span of 4 days.
In San Luis in May humidity is 67%. With an average temperature of 13°C (55°F), this humidity feels like a chilly embrace, making travel a bit uncomfortable as the cool air settles in.
In San Luis in May, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in San Luis.
UV Risk Categories
Weather in San Luis varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in San Luis, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 24°C (75°F) | 92 mm (3.6 inches) | 40% | extreme |
| February Weather | 22°C (72°F) | 79 mm (3.1 inches) | 48% | extreme |
| March Weather | 20°C (69°F) | 60 mm (2.4 inches) | 53% | extreme |
| April Weather | 17°C (63°F) | 72 mm (2.8 inches) | 63% | very high |
| May Weather | 13°C (55°F) | 32 mm (1.2 inches) | 67% | moderate |
| June Weather | 9°C (49°F) | 13 mm (0.5 inches) | 61% | moderate |
| July Weather | 9°C (48°F) | 9 mm (0.4 inches) | 55% | moderate |
| August Weather | 12°C (54°F) | 4 mm (0.2 inches) | 48% | high |
| September Weather | 15°C (59°F) | 21 mm (0.8 inches) | 45% | very high |
| October Weather | 18°C (64°F) | 32 mm (1.2 inches) | 43% | extreme |
| November Weather | 21°C (70°F) | 71 mm (2.8 inches) | 45% | extreme |
| December Weather | 23°C (74°F) | 63 mm (2.5 inches) | 40% | extreme |