Last updated: June 24, 2025
In December, the average temperature in Dayton, United States hovers around 0°C (33°F). Expect a chilly range where the minimum can plummet to -20°C (-4°F), while the maximum reaches a mild 15°C (59°F). Throughout the month, anticipate about 125 mm (4.9 in) of precipitation spread over 10 days, contributing to a notably high average humidity of 81%. Stay prepared for a brisk and damp climate!
In December in Dayton, the average temperature is 0°C (33°F). The maximum can reach 15°C (59°F) and the minimum can be as low as -20°C (-4°F). Travelers should be prepared for a wide range of temperatures and dress in layers to ensure comfort during their stay.
In Dayton in December, the precipitation amount is 125 mm (4.9 in) spread over a period of 10 days.
In Dayton in December, humidity is 81%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill enveloping you, making travel uncomfortable and the air heavy, leaving you craving warmth and dry conditions.
In Dayton 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 Dayton, you can visit Hourly UV Index in Dayton.
UV Risk Categories
Weather in Dayton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Dayton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (28°F) | 80 mm (3.2 inches) | 86% | low |
| February Weather | -2°C (29°F) | 90 mm (3.6 inches) | 84% | moderate |
| March Weather | 2°C (35°F) | 81 mm (3.2 inches) | 82% | moderate |
| April Weather | 7°C (46°F) | 122 mm (4.8 inches) | 80% | high |
| May Weather | 13°C (56°F) | 71 mm (2.8 inches) | 72% | very high |
| June Weather | 19°C (66°F) | 70 mm (2.8 inches) | 72% | very high |
| July Weather | 22°C (72°F) | 120 mm (4.7 inches) | 67% | very high |
| August Weather | 22°C (72°F) | 65 mm (2.5 inches) | 66% | very high |
| September Weather | 18°C (65°F) | 70 mm (2.8 inches) | 71% | high |
| October Weather | 12°C (54°F) | 128 mm (5.0 inches) | 78% | moderate |
| November Weather | 5°C (42°F) | 107 mm (4.2 inches) | 84% | moderate |
| December Weather | 0°C (33°F) | 125 mm (4.9 inches) | 81% | low |