Last updated: June 24, 2025
In December, the average temperature in Newport, United States is a chilly 2°C (36°F), with minimums dropping as low as -13°C (9°F) and maximums reaching up to 18°C (64°F). Expect some wet days, as precipitation averages around 89 mm (3.5 in) over 10 days, and prepare for a relatively high humidity level of 85%.
In December in Newport, the average temperature is 2°C (36°F). Maximum temperatures can reach 18°C (64°F), while minimums can drop as low as -13°C (9°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable during their visit.
In Newport in December, the precipitation amount is 89 mm (3.5 in) over a period of 10 days.
In Newport in December, humidity is 85%. With an average temperature of 2°C (36°F), this humidity feels like an icy blanket clinging to your skin, making travel challenging as the cold dampness seeps into your bones and fogs your breath.
In Newport 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 Newport, you can visit Hourly UV Index in Newport.
UV Risk Categories
Weather in Newport varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Newport, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (32°F) | 67 mm (2.6 inches) | 87% | moderate |
| February Weather | 1°C (35°F) | 102 mm (4.0 inches) | 85% | moderate |
| March Weather | 5°C (41°F) | 93 mm (3.7 inches) | 85% | high |
| April Weather | 11°C (52°F) | 103 mm (4.1 inches) | 83% | very high |
| May Weather | 17°C (62°F) | 123 mm (4.8 inches) | 75% | very high |
| June Weather | 22°C (71°F) | 98 mm (3.9 inches) | 73% | very high |
| July Weather | 25°C (77°F) | 126 mm (5.0 inches) | 65% | very high |
| August Weather | 24°C (75°F) | 106 mm (4.2 inches) | 62% | very high |
| September Weather | 20°C (68°F) | 130 mm (5.1 inches) | 66% | very high |
| October Weather | 14°C (58°F) | 116 mm (4.6 inches) | 79% | high |
| November Weather | 6°C (43°F) | 87 mm (3.4 inches) | 87% | moderate |
| December Weather | 2°C (36°F) | 89 mm (3.5 inches) | 85% | low |