Last updated: June 24, 2025
In December, the average temperature in Fairbury, United States hovers around 1°C (34°F), with a minimum drop as low as -20°C (-4°F) and a potential maximum rise to 22°C (71°F). Expect about 36 mm (1.4 in) of precipitation over approximately 3 days, accompanied by an average humidity level of 83%. Be prepared for a chilly but dynamic climate!
In December in Fairbury, the average temperature is 1°C (34°F), with maximums reaching 22°C (71°F) and minimums dropping as low as -20°C (-4°F). This wide temperature range makes it essential for travelers to pack layers and prepare for varying weather conditions.
In Fairbury in December, the precipitation amount is 36 mm (1.4 in) over a period of 3 days.
In Fairbury in December, humidity is 83%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making travel uncomfortable as the damp cold seeps into your bones, adding an extra layer of heaviness to the air that can leave you feeling sluggish and fatigued.
In Fairbury in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Fairbury, you can check the information here.
UV Risk Categories
Weather in Fairbury varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Fairbury, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (28°F) | 29 mm (1.1 inches) | 76% | moderate |
| February Weather | -2°C (28°F) | 24 mm (1.0 inches) | 80% | moderate |
| March Weather | 6°C (43°F) | 92 mm (3.6 inches) | 73% | high |
| April Weather | 11°C (52°F) | 48 mm (1.9 inches) | 74% | very high |
| May Weather | 18°C (64°F) | 170 mm (6.7 inches) | 78% | very high |
| June Weather | 25°C (77°F) | 94 mm (3.7 inches) | 82% | extreme |
| July Weather | 26°C (80°F) | 59 mm (2.3 inches) | 83% | extreme |
| August Weather | 24°C (76°F) | 90 mm (3.6 inches) | 80% | very high |
| September Weather | 22°C (71°F) | 75 mm (3.0 inches) | 75% | very high |
| October Weather | 12°C (54°F) | 106 mm (4.2 inches) | 75% | high |
| November Weather | 5°C (42°F) | 25 mm (1.0 inches) | 82% | moderate |
| December Weather | 1°C (34°F) | 36 mm (1.4 inches) | 83% | moderate |