Last updated: June 24, 2025
In May, the average temperature in Arlington Heights, United States is a comfortable 15°C (60°F). However, be prepared for a range of conditions — temperatures can dip to a brisk -1°C (30°F) or soar to a warm 32°C (90°F). Expect about 144 mm (5.7 in) of precipitation over 14 days, with an average humidity level of 75%. Whether basking in the sun or dodging the rain, be ready for a variety of weather experiences!
In May in Arlington Heights, the average temperature is 15°C (60°F), with maximums reaching up to 32°C (90°F) and minimums dipping as low as -1°C (30°F). This makes Arlington Heights an ideal destination for travelers seeking a mix of warm days and cool evenings.
In Arlington Heights in May, the precipitation amount is 144 mm (5.7 in) over the course of 14 days.
In Arlington Heights in May, humidity is 75%. With an average temperature of 15°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities slightly uncomfortable and requiring extra hydration while exploring the sights.
In Arlington Heights 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 Arlington Heights.
UV Risk Categories
Weather in Arlington Heights varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Arlington Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 76 mm (3.0 inches) | 87% | moderate |
| February Weather | 0°C (33°F) | 109 mm (4.3 inches) | 85% | moderate |
| March Weather | 3°C (39°F) | 97 mm (3.8 inches) | 85% | high |
| April Weather | 10°C (49°F) | 120 mm (4.7 inches) | 83% | very high |
| May Weather | 15°C (60°F) | 144 mm (5.7 inches) | 75% | very high |
| June Weather | 20°C (69°F) | 106 mm (4.2 inches) | 73% | very high |
| July Weather | 24°C (75°F) | 139 mm (5.5 inches) | 65% | very high |
| August Weather | 22°C (72°F) | 146 mm (5.7 inches) | 62% | very high |
| September Weather | 19°C (66°F) | 120 mm (4.7 inches) | 66% | very high |
| October Weather | 13°C (56°F) | 143 mm (5.6 inches) | 79% | high |
| November Weather | 5°C (42°F) | 95 mm (3.7 inches) | 87% | moderate |
| December Weather | 1°C (34°F) | 112 mm (4.4 inches) | 85% | low |