Last updated: June 24, 2025
In December, the average temperature in Port Allegany, United States hovers around -1°C (31°F). Temperatures can swing dramatically, with minimums plummeting to -20°C (-4°F) and maximums reaching a pleasant 15°C (60°F). Prepare for a fair amount of precipitation, totaling 94 mm (3.7 in) over approximately 14 days, and expect high humidity levels around 88%.
In December in Port Allegany, the average temperature is -1°C (31°F). Maximum temperatures can reach as high as 15°C (60°F), while minimums can drop to a chilly -20°C (-4°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.
In Port Allegany in December, the precipitation amount is 94 mm (3.7 in) recorded over the course of 14 days.
In Port Allegany in December, humidity is 88%. With an average temperature of -1°C (31°F), this humidity feels like a biting cold that penetrates your clothing, making outdoor exploration challenging and the air clingy, adding an extra chill that can make you feel even colder than the temperature suggests.
In Port Allegany 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 Port Allegany, you can visit Hourly UV Index in Port Allegany.
UV Risk Categories
Weather in Port Allegany varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Port Allegany, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 85 mm (3.3 inches) | 89% | moderate |
| February Weather | -2°C (28°F) | 100 mm (3.9 inches) | 90% | moderate |
| March Weather | 1°C (35°F) | 91 mm (3.6 inches) | 89% | high |
| April Weather | 7°C (45°F) | 118 mm (4.6 inches) | 88% | very high |
| May Weather | 14°C (57°F) | 142 mm (5.6 inches) | 80% | very high |
| June Weather | 18°C (65°F) | 115 mm (4.5 inches) | 79% | very high |
| July Weather | 21°C (70°F) | 119 mm (4.7 inches) | 74% | very high |
| August Weather | 20°C (68°F) | 98 mm (3.8 inches) | 64% | very high |
| September Weather | 16°C (62°F) | 99 mm (3.9 inches) | 67% | very high |
| October Weather | 11°C (52°F) | 125 mm (4.9 inches) | 81% | high |
| November Weather | 3°C (37°F) | 94 mm (3.7 inches) | 89% | moderate |
| December Weather | -1°C (31°F) | 94 mm (3.7 inches) | 88% | low |