Last updated: June 24, 2025
In Winthrop, United States, the average temperature for December hovers around -5°C (24°F), with extremes ranging from a brisk -25°C (-12°F) to a mild 15°C (59°F). During this month, expect about 42 mm (1.7 in) of precipitation spread over 6 days, and a notable average humidity of 84% adds to the chilly atmosphere.
In December in Winthrop, the average temperature is -5°C (24°F). Maximum temperatures can reach 15°C (59°F), while the minimum can drop as low as -25°C (-12°F). Travelers should be prepared for a wide range of temperatures, from chilly days to surprisingly warm spells.
In Winthrop in December, the total precipitation amount is 42 mm (1.7 in) spread over 6 days.
In Winthrop in December, humidity is 84%. With an average temperature of -5°C (24°F), this humidity feels like an icy blanket wrapped around you, making the air feel even colder and more biting, which can be quite uncomfortable for traveling.
In Winthrop 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 Winthrop, you can visit Hourly UV Index in Winthrop.
UV Risk Categories
Weather in Winthrop varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Winthrop, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -9°C (16°F) | 29 mm (1.1 inches) | 87% | moderate |
| February Weather | -9°C (16°F) | 30 mm (1.2 inches) | 90% | moderate |
| March Weather | 1°C (33°F) | 63 mm (2.5 inches) | 85% | moderate |
| April Weather | 6°C (44°F) | 82 mm (3.2 inches) | 84% | very high |
| May Weather | 15°C (60°F) | 130 mm (5.1 inches) | 78% | very high |
| June Weather | 22°C (72°F) | 101 mm (4.0 inches) | 80% | very high |
| July Weather | 23°C (74°F) | 123 mm (4.9 inches) | 81% | very high |
| August Weather | 21°C (71°F) | 127 mm (5.0 inches) | 81% | very high |
| September Weather | 18°C (65°F) | 120 mm (4.7 inches) | 81% | very high |
| October Weather | 9°C (49°F) | 96 mm (3.8 inches) | 84% | moderate |
| November Weather | 1°C (34°F) | 31 mm (1.2 inches) | 88% | moderate |
| December Weather | -5°C (24°F) | 42 mm (1.7 inches) | 84% | low |