Last updated: June 24, 2025
In Arlington Heights, United States, the average temperature in December hovers around 2°C (37°F). While it can dip to a chilly -16°C (3°F) at its lowest, you might experience a pleasant high of 12°C (54°F) on warmer days. Expect 365 mm (14.4 in) of precipitation spread over 21 days, contributing to the area's significant average humidity of 89%. Embrace the unique climate of this captivating destination!
In December in Arlington Heights, the average temperature is 2°C (37°F). The maximum can reach 12°C (54°F), while the minimum can drop as low as -16°C (3°F). Travelers should be prepared for chilly conditions and pack accordingly to fully enjoy their time in Arlington Heights.
In Arlington Heights in December, the precipitation amount is 365 mm (14.4 in) over a period of 21 days.
In Arlington Heights in December humidity is 89%. With an average temperature of 2°C (37°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring extra layers and a good waterproof jacket to keep warm and dry.
In Arlington Heights in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, 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 December’s weather to other months in Arlington Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 314 mm (12.4 inches) | 87% | low |
| February Weather | 2°C (36°F) | 325 mm (12.8 inches) | 86% | moderate |
| March Weather | 5°C (41°F) | 256 mm (10.1 inches) | 88% | moderate |
| April Weather | 8°C (47°F) | 214 mm (8.4 inches) | 86% | high |
| May Weather | 12°C (54°F) | 113 mm (4.4 inches) | 82% | very high |
| June Weather | 15°C (59°F) | 104 mm (4.1 inches) | 82% | very high |
| July Weather | 17°C (63°F) | 37 mm (1.5 inches) | 85% | very high |
| August Weather | 18°C (64°F) | 38 mm (1.5 inches) | 77% | very high |
| September Weather | 14°C (58°F) | 175 mm (6.9 inches) | 76% | high |
| October Weather | 8°C (47°F) | 302 mm (11.9 inches) | 88% | moderate |
| November Weather | 5°C (42°F) | 404 mm (15.9 inches) | 88% | moderate |
| December Weather | 2°C (37°F) | 365 mm (14.4 inches) | 89% | low |