Last updated: June 24, 2025
In Port Sanilac, United States, the average temperature in December hovers around 1°C (34°F). Expect chilly conditions, with minimum temperatures dipping to -14°C (7°F) and highs reaching up to 13°C (56°F). During this month, you can anticipate 79 mm (3.1 in) of precipitation over approximately 13 days, contributing to an average humidity of 86%. Whether you’re bracing for snow or rain, it’s best to come prepared!
In December in Port Sanilac, the average temperature is 1°C (34°F), with maximums reaching 13°C (56°F) and minimums plummeting as low as -14°C (7°F). Be prepared for chilly conditions, and make sure to pack warm clothing for your trip.
In Port Sanilac in December, the precipitation amount is 79 mm (3.1 in) over a span of 13 days.
In Port Sanilac in December, humidity is 86%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making outdoor adventures brisk and invigorating but challenging for travel.
In Port Sanilac 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 Sanilac, you can visit Hourly UV Index in Port Sanilac.
UV Risk Categories
Weather in Port Sanilac varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Port Sanilac, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (28°F) | 88 mm (3.5 inches) | 88% | low |
| February Weather | -3°C (27°F) | 87 mm (3.4 inches) | 87% | moderate |
| March Weather | 0°C (32°F) | 79 mm (3.1 inches) | 85% | moderate |
| April Weather | 3°C (38°F) | 113 mm (4.4 inches) | 86% | very high |
| May Weather | 7°C (45°F) | 100 mm (3.9 inches) | 80% | very high |
| June Weather | 14°C (58°F) | 77 mm (3.0 inches) | 80% | very high |
| July Weather | 20°C (68°F) | 71 mm (2.8 inches) | 80% | very high |
| August Weather | 21°C (70°F) | 82 mm (3.2 inches) | 80% | very high |
| September Weather | 18°C (65°F) | 89 mm (3.5 inches) | 80% | high |
| October Weather | 12°C (55°F) | 136 mm (5.3 inches) | 84% | moderate |
| November Weather | 5°C (41°F) | 99 mm (3.9 inches) | 89% | moderate |
| December Weather | 1°C (34°F) | 79 mm (3.1 inches) | 86% | low |