Last updated: June 24, 2025
In December, the average temperature in Green Rock, United States hovers around 0°C (33°F). However, be prepared for a wide range of weather, as temperatures can plummet to a chilling -21°C (-6°F) and occasionally reach as high as 21°C (70°F). Expect 49 mm (1.9 in) of precipitation spread over 6 days, and with an average humidity of 84%, the air will definitely feel damp and chilly.
In December in Green Rock, the average temperature is 0°C (33°F). Maximum temperatures can reach 21°C (70°F), while minimums can drop as low as -21°C (-6°F). Be prepared for a wide range of temperatures, making it essential to pack for both warmth and comfort while traveling.
In Green Rock in December, the precipitation amount is 49 mm (1.9 in) over the course of 6 days.
In Green Rock in December humidity is 84%. With average temperature 0°C (33°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures less enjoyable and travel plans challenging.
In Green Rock 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 Green Rock, you can visit Hourly UV Index in Green Rock.
UV Risk Categories
Weather in Green Rock varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Green Rock, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (24°F) | 55 mm (2.2 inches) | 81% | moderate |
| February Weather | -3°C (27°F) | 59 mm (2.3 inches) | 81% | moderate |
| March Weather | 5°C (40°F) | 93 mm (3.6 inches) | 81% | high |
| April Weather | 10°C (50°F) | 109 mm (4.3 inches) | 82% | very high |
| May Weather | 17°C (63°F) | 149 mm (5.9 inches) | 78% | very high |
| June Weather | 23°C (74°F) | 137 mm (5.4 inches) | 81% | extreme |
| July Weather | 25°C (77°F) | 88 mm (3.5 inches) | 79% | very high |
| August Weather | 23°C (74°F) | 73 mm (2.9 inches) | 77% | very high |
| September Weather | 20°C (69°F) | 107 mm (4.2 inches) | 78% | very high |
| October Weather | 12°C (55°F) | 120 mm (4.7 inches) | 78% | high |
| November Weather | 4°C (39°F) | 50 mm (2.0 inches) | 87% | moderate |
| December Weather | 0°C (33°F) | 49 mm (1.9 inches) | 84% | low |