Last updated: June 24, 2025
In Chillicothe, United States, the average temperature in December hovers around 3°C (38°F). Be prepared for a wide temperature range, with minimums dipping to -15°C (6°F) and maximums reaching up to 19°C (67°F). This month also brings an average precipitation of 109 mm (4.3 in) over 11 days, accompanied by a high humidity level of 87%. Stay cozy and ready for anything the weather throws your way!
In December in Chillicothe, the average temperature is 3°C (38°F). Maximum temperatures can reach 19°C (67°F), while minimums can plummet to as low as -15°C (6°F). Travelers should be prepared for a wide range of temperatures when visiting during this time.
In Chillicothe in December, the precipitation amount is 109 mm (4.3 in), occurring over a span of 11 days.
In Chillicothe in December humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.
In Chillicothe 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 Chillicothe, you can check the information here.
UV Risk Categories
Weather in Chillicothe varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Chillicothe, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (33°F) | 82 mm (3.2 inches) | 88% | moderate |
| February Weather | 3°C (37°F) | 113 mm (4.4 inches) | 88% | moderate |
| March Weather | 7°C (45°F) | 121 mm (4.8 inches) | 87% | high |
| April Weather | 12°C (54°F) | 131 mm (5.1 inches) | 85% | very high |
| May Weather | 18°C (65°F) | 124 mm (4.9 inches) | 81% | very high |
| June Weather | 22°C (73°F) | 134 mm (5.3 inches) | 82% | very high |
| July Weather | 25°C (77°F) | 112 mm (4.4 inches) | 81% | very high |
| August Weather | 24°C (75°F) | 99 mm (3.9 inches) | 73% | very high |
| September Weather | 21°C (70°F) | 98 mm (3.9 inches) | 73% | very high |
| October Weather | 15°C (59°F) | 111 mm (4.4 inches) | 78% | high |
| November Weather | 6°C (44°F) | 91 mm (3.6 inches) | 89% | moderate |
| December Weather | 3°C (38°F) | 109 mm (4.3 inches) | 87% | moderate |