Last updated: June 24, 2025
In December, the average temperature in Elgin, United States hovers around -2°C (29°F). Expect chilly nights with a minimum temperature plummeting to -24°C (-11°F), while the days can warm up to a pleasant 19°C (66°F). Precipitation levels are moderate, with about 43 mm (1.7 in) falling over 4 days, contributing to an average humidity of 79%. Prepare accordingly for a mix of cold and slightly damp weather!
In December in Elgin, the average temperature is -2°C (29°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -24°C (-11°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable during their visit.
In Elgin in December, the precipitation amount is 43 mm (1.7 in) over the course of 4 days.
In Elgin in December, humidity is 79%. With an average temperature of -2°C (29°F), this humidity feels like a heavy, bone-chilling dampness that can make traveling quite uncomfortable and intensifies the cold.
In Elgin in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Elgin, you can visit Hourly UV Index in Elgin.
UV Risk Categories
Weather in Elgin varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Elgin, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (24°F) | 25 mm (1.0 inches) | 73% | moderate |
| February Weather | -5°C (24°F) | 24 mm (0.9 inches) | 81% | moderate |
| March Weather | 3°C (38°F) | 87 mm (3.4 inches) | 69% | high |
| April Weather | 8°C (47°F) | 70 mm (2.7 inches) | 71% | very high |
| May Weather | 15°C (60°F) | 150 mm (5.9 inches) | 80% | very high |
| June Weather | 23°C (73°F) | 93 mm (3.7 inches) | 83% | extreme |
| July Weather | 24°C (76°F) | 93 mm (3.6 inches) | 84% | very high |
| August Weather | 23°C (73°F) | 89 mm (3.5 inches) | 84% | very high |
| September Weather | 19°C (67°F) | 64 mm (2.5 inches) | 77% | very high |
| October Weather | 10°C (50°F) | 85 mm (3.4 inches) | 72% | high |
| November Weather | 3°C (38°F) | 24 mm (0.9 inches) | 80% | moderate |
| December Weather | -2°C (29°F) | 43 mm (1.7 inches) | 79% | low |