Last updated: June 24, 2025
In Winthrop, United States, the average temperature in December hovers around -2°C (29°F), with extremes ranging from a chilly -22°C (-7°F) to a surprisingly warm 22°C (71°F). Expect about 39 mm (1.6 in) of precipitation spread over 6 days, contributing to an average humidity level of 82%. Embrace the winter ambiance while preparing for the varied weather!
In December in Winthrop, the average temperature is -2°C (29°F). Maximum temperatures can reach 22°C (71°F), while minimums can drop as low as -22°C (-7°F). Travelers should be prepared for significant temperature fluctuations during this time.
In Winthrop in December, the precipitation amount is 39 mm (1.6 in) over the course of 6 days.
In Winthrop in December, humidity is 82%. With an average temperature of -2°C (29°F), this humidity feels like a frigid chill that seeps into your bones, making travel quite uncomfortable and forcing you to bundle up tightly to ward off the damp cold that lingers in the air.
In Winthrop in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Winthrop, you can check the information here.
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 | -7°C (20°F) | 44 mm (1.7 inches) | 84% | moderate |
| February Weather | -6°C (21°F) | 54 mm (2.1 inches) | 85% | moderate |
| March Weather | 2°C (37°F) | 68 mm (2.7 inches) | 84% | moderate |
| April Weather | 8°C (47°F) | 78 mm (3.1 inches) | 83% | very high |
| May Weather | 16°C (61°F) | 173 mm (6.8 inches) | 75% | very high |
| June Weather | 22°C (72°F) | 139 mm (5.5 inches) | 79% | extreme |
| July Weather | 24°C (75°F) | 111 mm (4.4 inches) | 75% | very high |
| August Weather | 22°C (71°F) | 94 mm (3.7 inches) | 69% | very high |
| September Weather | 19°C (66°F) | 130 mm (5.1 inches) | 74% | very high |
| October Weather | 11°C (51°F) | 144 mm (5.7 inches) | 79% | moderate |
| November Weather | 2°C (36°F) | 47 mm (1.8 inches) | 88% | moderate |
| December Weather | -2°C (29°F) | 39 mm (1.6 inches) | 82% | moderate |