Last updated: June 24, 2025
In Lisbon, United States, the average temperature in May is a mild 15°C (59°F), with daily variations ranging from a minimum of 1°C (35°F) to a maximum of 33°C (92°F). Expect a precipitation total of 109 mm (4.3 in) over approximately 12 days, contributing to an average humidity level of 75%. Enjoy the diverse climate while exploring all that this destination has to offer!
In May, in Lisbon, the average temperature is 15°C (59°F). The maximum can reach 33°C (92°F) and the minimum can be as low as 1°C (35°F). Be prepared for a wide range of temperatures during your travels.
In Lisbon in May, the total precipitation amount is 109 mm (4.3 in) during a span of 12 days.
In Lisbon in May, humidity is 75%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it feel more oppressive than refreshing, which can be a challenge for travelers seeking comfort while exploring the area.
In Lisbon in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Lisbon.
UV Risk Categories
Weather in Lisbon varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Lisbon, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 0°C (33°F) | 72 mm (2.8 inches) | 84% | moderate |
February Weather | 1°C (35°F) | 92 mm (3.6 inches) | 84% | moderate |
March Weather | 4°C (40°F) | 98 mm (3.8 inches) | 82% | high |
April Weather | 9°C (49°F) | 129 mm (5.1 inches) | 79% | very high |
May Weather | 15°C (59°F) | 109 mm (4.3 inches) | 75% | very high |
June Weather | 20°C (68°F) | 96 mm (3.8 inches) | 78% | very high |
July Weather | 23°C (75°F) | 149 mm (5.8 inches) | 76% | very high |
August Weather | 23°C (74°F) | 111 mm (4.4 inches) | 76% | very high |
September Weather | 19°C (67°F) | 96 mm (3.8 inches) | 75% | very high |
October Weather | 14°C (58°F) | 132 mm (5.2 inches) | 75% | high |
November Weather | 7°C (45°F) | 101 mm (4.0 inches) | 80% | moderate |
December Weather | 2°C (36°F) | 130 mm (5.1 inches) | 80% | low |