Last updated: August 27, 2025
In Sao Luis, Portugal, the average temperature in May hovers around 18°C (65°F). Expect a range where it can drop to a cool 9°C (49°F) or soar to a warm 32°C (90°F). The region sees a light precipitation of 23 mm (0.9 in) spread over about 4 days, and the average humidity sits at a comfortable 69%.
In May in Sao Luis, the average temperature is 18°C (65°F). The maximum can reach 32°C (90°F) and the minimum can be as low as 9°C (49°F). This climate makes Sao Luis an ideal destination for travelers seeking pleasant weather and outdoor activities during this time of year.
In Sao Luis in May, the total precipitation amount is 23 mm (0.9 in) over a span of 4 days.
In Sao Luis in May humidity is 69%. With an average temperature of 18°C (65°F), this humidity feels like a warm, damp blanket around you, making travel less comfortable and causing you to feel sticky and fatigued more quickly.
In Sao Luis in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Sao Luis.
UV Risk Categories
Weather in Sao Luis varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Sao Luis, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 11°C (52°F) | 29 mm (1.1 inches) | 80% | moderate |
February Weather | 13°C (55°F) | 54 mm (2.1 inches) | 73% | moderate |
March Weather | 14°C (57°F) | 83 mm (3.3 inches) | 71% | high |
April Weather | 15°C (60°F) | 66 mm (2.6 inches) | 69% | very high |
May Weather | 18°C (65°F) | 23 mm (0.9 inches) | 69% | very high |
June Weather | 19°C (67°F) | 10 mm (0.4 inches) | 67% | extreme |
July Weather | 21°C (70°F) | 3 mm (0.1 inches) | 69% | very high |
August Weather | 22°C (71°F) | 2 mm (0.1 inches) | 68% | very high |
September Weather | 21°C (70°F) | 11 mm (0.4 inches) | 71% | very high |
October Weather | 19°C (66°F) | 45 mm (1.8 inches) | 75% | high |
November Weather | 15°C (59°F) | 58 mm (2.3 inches) | 78% | moderate |
December Weather | 13°C (55°F) | 51 mm (2.0 inches) | 81% | moderate |