Last updated: June 24, 2025
In December, the average temperature in Roseau, United States hovers around -10°C (14°F). During this chilly month, temperatures can plunge to a biting -35°C (-32°F), while occasionally reaching a mild 6°C (43°F). Expect 34 mm (1.3 in) of precipitation spread over 8 days, accompanied by a high average humidity of 93%, creating a cold and damp atmosphere.
In December in Roseau, the average temperature is -10°C (14°F). Maximum temperatures can reach 6°C (43°F), while minimum temperatures can dip as low as -35°C (-32°F). Travelers should be prepared for extremely cold conditions and dress accordingly to ensure a comfortable visit.
In Roseau in December, the precipitation amount is 34 mm (1.3 in) over a span of 8 days.
In Roseau in December, humidity is 93%. With an average temperature of -10°C (14°F), this humidity feels like an invisible weight on your skin, making every breath feel thick and heavy, while the cold air bites sharply, creating a contrasting and uncomfortable chill that can make traveling outdoors feel like a daunting challenge.
In Roseau 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 Roseau.
UV Risk Categories
Weather in Roseau varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Roseau, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -14°C (8°F) | 20 mm (0.8 inches) | 94% | low |
| February Weather | -15°C (6°F) | 22 mm (0.9 inches) | 91% | moderate |
| March Weather | -4°C (25°F) | 23 mm (0.9 inches) | 90% | moderate |
| April Weather | 3°C (37°F) | 38 mm (1.5 inches) | 81% | high |
| May Weather | 12°C (54°F) | 60 mm (2.4 inches) | 74% | very high |
| June Weather | 19°C (66°F) | 80 mm (3.2 inches) | 75% | very high |
| July Weather | 21°C (70°F) | 74 mm (2.9 inches) | 74% | very high |
| August Weather | 19°C (66°F) | 74 mm (2.9 inches) | 77% | very high |
| September Weather | 14°C (57°F) | 80 mm (3.1 inches) | 75% | high |
| October Weather | 5°C (42°F) | 82 mm (3.2 inches) | 78% | moderate |
| November Weather | -4°C (24°F) | 30 mm (1.2 inches) | 87% | low |
| December Weather | -10°C (14°F) | 34 mm (1.3 inches) | 93% | low |