Last updated: June 24, 2025
In Dayton, United States, the average temperature for December hovers around 1°C (34°F). However, temperatures can vary widely, with a minimum of -15°C (6°F) and a maximum of 17°C (63°F). Expect about 106 mm (4.2 in) of precipitation spread over 13 days, contributing to an average humidity level of 88%, creating a crisp and damp atmosphere.
In December in Dayton, the average temperature is 1°C (34°F). The maximum can reach 17°C (63°F) and the minimum can be as low as -15°C (6°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 106 mm (4.2 in) spread over a duration of 13 days.
In Dayton in December humidity is 88%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making travel feel damp and brisk, where every breath carries a crisp bite, and the air clings to your skin, urging you to seek warmth and comfort.
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 (29°F) | 100 mm (3.9 inches) | 89% | moderate |
| February Weather | 0°C (32°F) | 123 mm (4.8 inches) | 90% | moderate |
| March Weather | 4°C (39°F) | 106 mm (4.2 inches) | 89% | high |
| April Weather | 9°C (49°F) | 135 mm (5.3 inches) | 88% | very high |
| May Weather | 15°C (60°F) | 156 mm (6.1 inches) | 80% | very high |
| June Weather | 20°C (68°F) | 139 mm (5.5 inches) | 79% | very high |
| July Weather | 23°C (73°F) | 137 mm (5.4 inches) | 74% | very high |
| August Weather | 22°C (71°F) | 105 mm (4.1 inches) | 64% | very high |
| September Weather | 18°C (65°F) | 125 mm (4.9 inches) | 67% | very high |
| October Weather | 13°C (55°F) | 128 mm (5.0 inches) | 81% | high |
| November Weather | 4°C (40°F) | 100 mm (3.9 inches) | 89% | moderate |
| December Weather | 1°C (34°F) | 106 mm (4.2 inches) | 88% | low |