Last updated: June 24, 2025
In December, the average temperature in Edison, United States hovers around 12°C (54°F). Expect chilly nights with a minimum dipping to -4°C (24°F), while brighter days can reach a pleasant 27°C (80°F). Be prepared for some rain, as 125 mm (4.9 in) of precipitation is likely spread over 11 days. With an average humidity of 88%, the air will feel quite moist, adding to the unique charm of the season.
In December in Edison, the average temperature is 12°C (54°F). The maximum can reach 27°C (80°F) and the minimum can be as low as -4°C (24°F). This variety in temperatures makes it essential for travelers to pack layers to enjoy their stay comfortably.
In Edison in December, the precipitation amount is 125 mm (4.9 in) over the course of 11 days.
In Edison in December, humidity is 88%. With an average temperature of 12°C (54°F), this humidity feels like a thick, damp blanket, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat even in cooler weather.
In Edison in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Edison for better planning.
UV Risk Categories
Weather in Edison varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Edison, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 11°C (52°F) | 88 mm (3.5 inches) | 85% | moderate |
| February Weather | 14°C (58°F) | 114 mm (4.5 inches) | 82% | very high |
| March Weather | 17°C (62°F) | 85 mm (3.3 inches) | 80% | very high |
| April Weather | 19°C (67°F) | 113 mm (4.4 inches) | 76% | very high |
| May Weather | 24°C (75°F) | 89 mm (3.5 inches) | 73% | extreme |
| June Weather | 26°C (80°F) | 103 mm (4.0 inches) | 74% | extreme |
| July Weather | 28°C (82°F) | 119 mm (4.7 inches) | 80% | extreme |
| August Weather | 28°C (82°F) | 123 mm (4.8 inches) | 79% | extreme |
| September Weather | 26°C (79°F) | 115 mm (4.5 inches) | 83% | very high |
| October Weather | 22°C (72°F) | 98 mm (3.9 inches) | 77% | very high |
| November Weather | 15°C (59°F) | 49 mm (1.9 inches) | 84% | high |
| December Weather | 12°C (54°F) | 125 mm (4.9 inches) | 88% | moderate |