Last updated: June 24, 2025
In Black Forest, United States during May, the average temperature hovers around 11°C (52°F). Visitors should be prepared for a temperature range that can dip as low as -8°C (19°F) and rise to a potential high of 30°C (86°F). Expect 86 mm (3.4 in) of precipitation spread over 14 days, contributing to an average humidity level of 74%. Whether you're seeking adventure or relaxation, this month offers a variety of experiences in Black Forest!
In May in Black Forest, the average temperature is 11°C (52°F). The maximum can reach 30°C (86°F), while the minimum can drop to as low as -8°C (19°F). Be prepared for a wide range of temperatures when planning your travel, as layering your clothing will help you adjust to the fluctuating weather conditions.
In Black Forest in May, the precipitation amount is 86 mm (3.4 in) over the course of 14 days.
In Black Forest in May, humidity is 74%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill in the air, making travel outdoors feel heavier and more cumbersome, often leading to discomfort and a need for warmer clothing.
In Black Forest in May, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Black Forest.
UV Risk Categories
Weather in Black Forest varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Black Forest, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (26°F) | 15 mm (0.6 inches) | 74% | moderate |
| February Weather | -4°C (25°F) | 24 mm (0.9 inches) | 75% | high |
| March Weather | 2°C (35°F) | 55 mm (2.2 inches) | 66% | very high |
| April Weather | 6°C (42°F) | 47 mm (1.9 inches) | 62% | extreme |
| May Weather | 11°C (52°F) | 86 mm (3.4 inches) | 74% | extreme |
| June Weather | 18°C (64°F) | 44 mm (1.8 inches) | 76% | extreme |
| July Weather | 20°C (68°F) | 85 mm (3.3 inches) | 75% | extreme |
| August Weather | 19°C (67°F) | 53 mm (2.1 inches) | 80% | extreme |
| September Weather | 16°C (61°F) | 36 mm (1.4 inches) | 79% | very high |
| October Weather | 7°C (45°F) | 38 mm (1.5 inches) | 77% | high |
| November Weather | 2°C (36°F) | 20 mm (0.8 inches) | 74% | moderate |
| December Weather | -2°C (29°F) | 11 mm (0.4 inches) | 80% | moderate |