Last updated: June 24, 2025
In Coatesville, United States, the average temperature in December hovers around 2°C (36°F), with fluctuations ranging from a minimum of -20°C (-3°F) to a maximum of 18°C (64°F). Expect 82 mm (3.2 in) of precipitation spread over 10 rainy days, contributing to an average humidity of 87%. Stay prepared for a chilly, damp month!
In December in Coatesville, the average temperature is 2°C (36°F). The maximum can reach 18°C (64°F) and the minimum can be as low as -20°C (-3°F). Be prepared for a wide range of temperatures during your travels, and dress accordingly!
In Coatesville in December, the total precipitation amount is 82 mm (3.2 in) observed over a span of 10 days.
In Coatesville in December, humidity is 87%. With an average temperature of 2°C (36°F), this humidity feels like an unwelcome chill that seeps into your bones, making outdoor exploration feel damp and heavy, and encouraging travelers to seek the warmth of indoor attractions instead.
In Coatesville 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 Coatesville, you can check the information here.
UV Risk Categories
Weather in Coatesville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Coatesville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 84 mm (3.3 inches) | 87% | moderate |
| February Weather | 1°C (33°F) | 91 mm (3.6 inches) | 85% | moderate |
| March Weather | 6°C (43°F) | 126 mm (5.0 inches) | 86% | high |
| April Weather | 11°C (52°F) | 101 mm (4.0 inches) | 84% | very high |
| May Weather | 18°C (65°F) | 141 mm (5.6 inches) | 79% | very high |
| June Weather | 23°C (74°F) | 108 mm (4.3 inches) | 82% | extreme |
| July Weather | 25°C (77°F) | 101 mm (4.0 inches) | 79% | very high |
| August Weather | 23°C (74°F) | 104 mm (4.1 inches) | 70% | very high |
| September Weather | 21°C (70°F) | 69 mm (2.7 inches) | 69% | very high |
| October Weather | 14°C (58°F) | 111 mm (4.4 inches) | 76% | high |
| November Weather | 5°C (42°F) | 89 mm (3.5 inches) | 88% | moderate |
| December Weather | 2°C (36°F) | 82 mm (3.2 inches) | 87% | moderate |