Last updated: June 24, 2025
In December, the average temperature in Peoria, United States hovers around 1°C (34°F). This month can see extremes, with minimums dipping to -21°C (-6°F) and maximums reaching up to 20°C (68°F). Expect about 55 mm (2.2 in) of precipitation spread across 6 days, contributing to an average humidity of 84%. Stay prepared for a mix of chilly days and wet weather!
In December in Peoria, the average temperature is 1°C (34°F). The maximum can reach 20°C (68°F), while the minimum can be as low as -21°C (-6°F). It's advisable to pack layers when traveling to this destination during this time of year, as the temperature can fluctuate significantly.
In Peoria in December, the total precipitation amount is 55 mm (2.2 in) spread over 6 days.
In Peoria in December humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.
In Peoria 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 Peoria, you can visit Hourly UV Index in Peoria.
UV Risk Categories
Weather in Peoria varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Peoria, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 61 mm (2.4 inches) | 82% | moderate |
| February Weather | -2°C (29°F) | 67 mm (2.7 inches) | 83% | moderate |
| March Weather | 5°C (42°F) | 108 mm (4.3 inches) | 84% | high |
| April Weather | 10°C (51°F) | 116 mm (4.6 inches) | 85% | very high |
| May Weather | 18°C (64°F) | 167 mm (6.6 inches) | 79% | very high |
| June Weather | 23°C (74°F) | 148 mm (5.8 inches) | 82% | extreme |
| July Weather | 25°C (77°F) | 107 mm (4.2 inches) | 80% | very high |
| August Weather | 23°C (74°F) | 74 mm (2.9 inches) | 81% | very high |
| September Weather | 21°C (70°F) | 71 mm (2.8 inches) | 80% | very high |
| October Weather | 13°C (56°F) | 131 mm (5.2 inches) | 82% | high |
| November Weather | 4°C (40°F) | 57 mm (2.3 inches) | 88% | moderate |
| December Weather | 1°C (34°F) | 55 mm (2.2 inches) | 84% | low |