Last updated: June 24, 2025
In December, the average temperature in Clayton, United States hovers around 8°C (47°F). Expect a temperature range that can dip as low as -8°C (18°F) and rise to a pleasant 24°C (75°F). With 106 mm (4.2 in) of precipitation spread over 9 days, it's a rather wet month, complemented by an average humidity level of 86%. Be prepared for a mix of chilly and mild days!
In December in Clayton, the average temperature is 8°C (47°F). Maximum temperatures can reach 24°C (75°F) while minimums can drop to as low as -8°C (18°F). It's a great time to explore Clayton, so be prepared for varying weather conditions and pack accordingly!
In Clayton in December, the total precipitation amount is 106 mm (4.2 in), spread over the course of 9 days.
In Clayton in December, humidity is 86%. With an average temperature of 8°C (47°F), this humidity feels like a chilling damp that penetrates your clothes, making outdoor adventures less enjoyable and encouraging you to seek warmth indoors rather than explore the sights.
In Clayton 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 Clayton, you can check the information here.
UV Risk Categories
Weather in Clayton varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Clayton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 6°C (43°F) | 93 mm (3.7 inches) | 85% | moderate |
| February Weather | 9°C (49°F) | 102 mm (4.0 inches) | 82% | high |
| March Weather | 11°C (53°F) | 79 mm (3.1 inches) | 81% | very high |
| April Weather | 17°C (62°F) | 113 mm (4.5 inches) | 80% | very high |
| May Weather | 22°C (71°F) | 119 mm (4.7 inches) | 81% | very high |
| June Weather | 25°C (76°F) | 137 mm (5.4 inches) | 81% | extreme |
| July Weather | 27°C (81°F) | 123 mm (4.8 inches) | 81% | extreme |
| August Weather | 26°C (79°F) | 156 mm (6.2 inches) | 80% | very high |
| September Weather | 23°C (74°F) | 139 mm (5.5 inches) | 79% | very high |
| October Weather | 18°C (65°F) | 82 mm (3.2 inches) | 80% | very high |
| November Weather | 11°C (52°F) | 84 mm (3.3 inches) | 85% | moderate |
| December Weather | 8°C (47°F) | 106 mm (4.2 inches) | 86% | moderate |