Last updated: June 24, 2025
In April, the average temperature in San Luis, United States hovers around 5°C (42°F). Expect chilly days with a minimum plunging to -10°C (14°F), while the mercury can rise to a pleasant 21°C (70°F) at times. Be prepared for some rain, as 35 mm (1.4 in) of precipitation may fall over approximately 8 days. The air will feel quite humid, with an average humidity level of 68%.
In April, in San Luis, the average temperature is 5°C (42°F). Maximums can reach 21°C (70°F), while minimums can drop as low as -10°C (14°F). Be prepared for a wide range of temperatures when planning your trip!
In San Luis in April, the precipitation amount is 35 mm (1.4 in) over the course of 8 days.
In San Luis in April, humidity is 68%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that penetrates your clothes, making outdoor activities less enjoyable and often prompting travelers to seek shelter or warm indoor spaces.
In San Luis in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. 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 April’s weather to other months in San Luis, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 23 mm (0.9 inches) | 84% | moderate |
| February Weather | -4°C (25°F) | 25 mm (1.0 inches) | 84% | high |
| March Weather | 1°C (34°F) | 37 mm (1.5 inches) | 74% | very high |
| April Weather | 5°C (42°F) | 35 mm (1.4 inches) | 68% | extreme |
| May Weather | 10°C (51°F) | 42 mm (1.6 inches) | 62% | extreme |
| June Weather | 16°C (62°F) | 28 mm (1.1 inches) | 55% | extreme |
| July Weather | 18°C (65°F) | 71 mm (2.8 inches) | 54% | extreme |
| August Weather | 17°C (63°F) | 45 mm (1.8 inches) | 61% | extreme |
| September Weather | 14°C (57°F) | 31 mm (1.2 inches) | 70% | extreme |
| October Weather | 7°C (45°F) | 27 mm (1.1 inches) | 78% | very high |
| November Weather | 2°C (35°F) | 17 mm (0.7 inches) | 81% | moderate |
| December Weather | -4°C (25°F) | 23 mm (0.9 inches) | 85% | moderate |