Last updated: June 24, 2025
In May, the average temperature in Mount Vernon, United States hovers around 10°C (50°F). Expect a minimum of -5°C (23°F) and a maximum of 29°C (84°F), offering a diverse range of weather. With an average precipitation of 73 mm (2.9 in) spread over 13 days, you might want to pack an umbrella. The climate is characterized by a relatively high average humidity of 77%, contributing to that unique local atmosphere.
In May in Mount Vernon, the average temperature is 10°C (50°F). Maximum temperatures can reach 29°C (84°F), while minimums can drop as low as -5°C (23°F). Be prepared for a wide range of temperatures when traveling during this time.
In Mount Vernon in May, the precipitation amount is 73 mm (2.9 in) over the course of 13 days.
In Mount Vernon in May, humidity is 77%. With an average temperature of 10°C (50°F), this humidity feels like a thick, heavy blanket enveloping you, making travel uncomfortable and sticky, as it clings to your skin and clothes, turning each step into a challenge.
In Mount Vernon 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 Mount Vernon.
UV Risk Categories
Weather in Mount Vernon varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Mount Vernon, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (28°F) | 70 mm (2.7 inches) | 86% | moderate |
| February Weather | -2°C (29°F) | 101 mm (4.0 inches) | 86% | moderate |
| March Weather | 2°C (35°F) | 78 mm (3.1 inches) | 85% | high |
| April Weather | 5°C (41°F) | 80 mm (3.1 inches) | 83% | very high |
| May Weather | 10°C (50°F) | 73 mm (2.9 inches) | 77% | very high |
| June Weather | 15°C (59°F) | 41 mm (1.6 inches) | 81% | extreme |
| July Weather | 20°C (69°F) | 3 mm (0.1 inches) | 76% | very high |
| August Weather | 20°C (68°F) | 14 mm (0.6 inches) | 60% | very high |
| September Weather | 14°C (58°F) | 31 mm (1.2 inches) | 58% | very high |
| October Weather | 6°C (44°F) | 56 mm (2.2 inches) | 75% | high |
| November Weather | 1°C (35°F) | 62 mm (2.4 inches) | 85% | moderate |
| December Weather | -2°C (28°F) | 67 mm (2.6 inches) | 87% | low |