Last updated: June 24, 2025
In December, the average temperature in Bryn Mawr-Skyway, United States hovers around 6°C (42°F). Expect minimums to drop as low as -7°C (20°F), while the maximums can reach up to 14°C (58°F). With an average precipitation of 196 mm (7.7 in) spread over 19 days, and a notable humidity level at 88%, be prepared for a distinctly chilly and damp experience.
In December in Bryn Mawr-Skyway, the average temperature is 6°C (42°F), with maximums reaching 14°C (58°F) and minimums dipping as low as -7°C (20°F). Travelers should be prepared for a range of temperatures and pack accordingly to enjoy their visit.
In Bryn Mawr-Skyway in December, the precipitation amount is 196 mm (7.7 in) over the course of 19 days.
In Bryn Mawr-Skyway in December, humidity is 88%. With an average temperature of 6°C (42°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as the cold air clings to your skin and saps your energy.
In Bryn Mawr-Skyway in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Bryn Mawr-Skyway.
UV Risk Categories
Weather in Bryn Mawr-Skyway varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Bryn Mawr-Skyway, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 6°C (43°F) | 175 mm (6.9 inches) | 86% | low |
February Weather | 5°C (41°F) | 177 mm (7.0 inches) | 86% | moderate |
March Weather | 7°C (46°F) | 126 mm (4.9 inches) | 87% | moderate |
April Weather | 10°C (50°F) | 117 mm (4.6 inches) | 84% | high |
May Weather | 14°C (57°F) | 68 mm (2.7 inches) | 81% | very high |
June Weather | 17°C (62°F) | 63 mm (2.5 inches) | 82% | very high |
July Weather | 19°C (67°F) | 18 mm (0.7 inches) | 79% | very high |
August Weather | 19°C (67°F) | 16 mm (0.6 inches) | 63% | very high |
September Weather | 16°C (62°F) | 100 mm (3.9 inches) | 62% | high |
October Weather | 11°C (52°F) | 155 mm (6.1 inches) | 83% | moderate |
November Weather | 8°C (47°F) | 181 mm (7.1 inches) | 89% | low |
December Weather | 6°C (42°F) | 196 mm (7.7 inches) | 88% | low |