Last updated: June 24, 2025
In December, the average temperature in River Road, United States hovers around 9°C (49°F), where the weather can swing from a chilly -8°C (17°F) to a warm 25°C (78°F). Be prepared for 108 mm (4.3 in) of precipitation spread over 9 days, and an average humidity level of 84%, creating a uniquely refreshing atmosphere.
In December in River Road, the average temperature is 9°C (49°F). The maximum can reach 25°C (78°F) and the minimum can be as low as -8°C (17°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your trip.
In River Road in December, the precipitation amount is 108 mm (4.3 in) spread over 9 days.
In River Road in December, humidity is 84%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cool yet clammy.
In River Road 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 River Road, you can check the information here.
UV Risk Categories
Weather in River Road varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in River Road, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 7°C (45°F) | 85 mm (3.4 inches) | 84% | moderate |
| February Weather | 10°C (50°F) | 90 mm (3.5 inches) | 81% | high |
| March Weather | 12°C (54°F) | 68 mm (2.7 inches) | 80% | very high |
| April Weather | 17°C (63°F) | 103 mm (4.1 inches) | 80% | very high |
| May Weather | 21°C (71°F) | 118 mm (4.6 inches) | 81% | extreme |
| June Weather | 25°C (77°F) | 152 mm (6.0 inches) | 82% | extreme |
| July Weather | 27°C (80°F) | 159 mm (6.3 inches) | 83% | extreme |
| August Weather | 26°C (79°F) | 182 mm (7.2 inches) | 82% | very high |
| September Weather | 24°C (75°F) | 147 mm (5.8 inches) | 80% | very high |
| October Weather | 19°C (67°F) | 72 mm (2.8 inches) | 79% | very high |
| November Weather | 12°C (54°F) | 97 mm (3.8 inches) | 83% | moderate |
| December Weather | 9°C (49°F) | 108 mm (4.3 inches) | 84% | moderate |