Last updated: June 24, 2025
In December, the average temperature in Roslyn Heights, United States hovers around 4°C (39°F). However, temperatures can dip as low as -10°C (13°F) or rise to a maximum of 17°C (64°F). Prepare for wet conditions, with 117 mm (4.6 in) of precipitation expected over 10 days and an average humidity level of 80%.
In December in Roslyn Heights, the average temperature is 4°C (39°F). The maximum can reach 17°C (64°F), while the minimum can dip as low as -10°C (13°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable.
In Roslyn Heights in December, the total precipitation amount is 117 mm (4.6 in) recorded over a span of 10 days.
In Roslyn Heights in December, humidity is 80%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring extra layers to stay warm while navigating through the misty streets.
In Roslyn Heights 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 Roslyn Heights, you can visit Hourly UV Index in Roslyn Heights.
UV Risk Categories
Weather in Roslyn Heights varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Roslyn Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (35°F) | 72 mm (2.8 inches) | 84% | moderate |
| February Weather | 2°C (37°F) | 106 mm (4.2 inches) | 82% | moderate |
| March Weather | 5°C (42°F) | 98 mm (3.9 inches) | 81% | high |
| April Weather | 10°C (51°F) | 115 mm (4.5 inches) | 78% | very high |
| May Weather | 16°C (61°F) | 117 mm (4.6 inches) | 69% | very high |
| June Weather | 22°C (71°F) | 89 mm (3.5 inches) | 69% | very high |
| July Weather | 25°C (78°F) | 142 mm (5.6 inches) | 62% | very high |
| August Weather | 24°C (76°F) | 124 mm (4.9 inches) | 65% | very high |
| September Weather | 21°C (70°F) | 91 mm (3.6 inches) | 68% | very high |
| October Weather | 16°C (61°F) | 130 mm (5.1 inches) | 74% | high |
| November Weather | 8°C (47°F) | 90 mm (3.5 inches) | 82% | moderate |
| December Weather | 4°C (39°F) | 117 mm (4.6 inches) | 80% | low |