Last updated: June 24, 2025
In May, the average temperature in Crystal Lake, United States hovers around 15°C (59°F). However, be prepared for a range of conditions, as temperatures can drop to a minimum of 1°C (34°F) and soar to a maximum of 34°C (93°F). During this time, expect 110 mm (4.3 in) of precipitation spread across approximately 12 days, with an average humidity level of 69%.
In May in Crystal Lake, the average temperature is 15°C (59°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop to a chilly 1°C (34°F). Make sure to pack both light summer clothes and warmer layers for your trip!
In Crystal Lake in May, the precipitation amount is 110 mm (4.3 in) over a span of 12 days.
In Crystal Lake in May humidity is 69%. With an average temperature of 15°C (59°F), this humidity feels like a mild blanket wrapping around you, making it slightly uncomfortable for traveling; you'll likely find yourself seeking shade and refreshing drinks to stay cool as you explore.
In Crystal Lake 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 Crystal Lake.
UV Risk Categories
Weather in Crystal Lake varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Crystal Lake, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -1°C (30°F) | 69 mm (2.7 inches) | 84% | moderate |
February Weather | 0°C (32°F) | 88 mm (3.5 inches) | 82% | moderate |
March Weather | 3°C (38°F) | 85 mm (3.4 inches) | 81% | high |
April Weather | 9°C (49°F) | 128 mm (5.0 inches) | 78% | very high |
May Weather | 15°C (59°F) | 110 mm (4.3 inches) | 69% | very high |
June Weather | 20°C (69°F) | 79 mm (3.1 inches) | 69% | very high |
July Weather | 23°C (74°F) | 141 mm (5.6 inches) | 62% | very high |
August Weather | 23°C (73°F) | 86 mm (3.4 inches) | 65% | very high |
September Weather | 19°C (66°F) | 101 mm (4.0 inches) | 68% | very high |
October Weather | 13°C (56°F) | 138 mm (5.4 inches) | 74% | high |
November Weather | 5°C (42°F) | 92 mm (3.6 inches) | 82% | moderate |
December Weather | 1°C (34°F) | 121 mm (4.8 inches) | 80% | low |