Last updated: June 24, 2025
In December, the average temperature in Cedar Grove, United States hovers around 5°C (41°F). However, be prepared for a wide range, as temperatures can drop to a chilly -14°C (8°F) or rise to a balmy 21°C (70°F). During this time, you can expect about 123 mm (4.8 in) of precipitation over approximately 12 days, contributing to an average humidity of 86%. Stay cozy and prepared for the elements!
In December in Cedar Grove, the average temperature is 5°C (41°F). Maximums can reach 21°C (70°F) and minimums can be as low as -14°C (8°F). Be sure to pack layers to stay comfortable as the weather can vary dramatically.
In Cedar Grove in December, the precipitation amount is 123 mm (4.8 in) during a period of 12 days.
In Cedar Grove in December humidity is 86%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket wrapping around you, making outdoor activities uncomfortable and travel quite challenging due to the chill combined with the stickiness in the air.
In Cedar Grove 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 Cedar Grove, you can check the information here.
UV Risk Categories
Weather in Cedar Grove varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Cedar Grove, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (36°F) | 102 mm (4.0 inches) | 88% | moderate |
| February Weather | 5°C (42°F) | 158 mm (6.2 inches) | 88% | moderate |
| March Weather | 8°C (47°F) | 123 mm (4.8 inches) | 88% | high |
| April Weather | 13°C (56°F) | 133 mm (5.2 inches) | 86% | very high |
| May Weather | 18°C (66°F) | 164 mm (6.5 inches) | 82% | very high |
| June Weather | 22°C (72°F) | 153 mm (6.0 inches) | 84% | very high |
| July Weather | 24°C (76°F) | 132 mm (5.2 inches) | 82% | very high |
| August Weather | 23°C (74°F) | 121 mm (4.8 inches) | 73% | very high |
| September Weather | 21°C (70°F) | 103 mm (4.1 inches) | 73% | very high |
| October Weather | 15°C (60°F) | 117 mm (4.6 inches) | 81% | high |
| November Weather | 8°C (46°F) | 80 mm (3.2 inches) | 89% | moderate |
| December Weather | 5°C (41°F) | 123 mm (4.8 inches) | 86% | moderate |