Last updated: June 24, 2025
In December, the average temperature in Brooklyn, United States is a chilly -1°C (31°F), with extremes ranging from a frigid -23°C (-8°F) to a surprisingly warm 23°C (73°F). Expect about 39 mm (1.6 in) of precipitation spread over 6 days, contributing to the region's 83% average humidity—perfect for cozy indoor activities or bundling up for outdoor adventures!
In December in Brooklyn, the average temperature is -1°C (31°F), with maximums reaching 23°C (73°F) and minimums plummeting as low as -23°C (-8°F). Travelers should be prepared for a wide range of temperatures, from chilly conditions requiring warm clothing to occasional mild days suitable for outdoor activities.
In Brooklyn in December, the precipitation amount is 39 mm (1.6 in) over the course of 6 days.
In Brooklyn in December humidity is 83%. With an average temperature of -1°C (31°F), this humidity feels like a heavy, icy blanket enveloping you, making each step outside feel like a struggle against the cold, damp air that clings to your skin, often leaving you wishing for warmth and refuge indoors.
In Brooklyn 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 Brooklyn, you can check the information here.
UV Risk Categories
Weather in Brooklyn varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Brooklyn, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 44 mm (1.7 inches) | 78% | moderate |
| February Weather | -5°C (23°F) | 50 mm (2.0 inches) | 80% | moderate |
| March Weather | 4°C (39°F) | 78 mm (3.1 inches) | 77% | high |
| April Weather | 9°C (49°F) | 81 mm (3.2 inches) | 77% | very high |
| May Weather | 17°C (62°F) | 166 mm (6.6 inches) | 77% | very high |
| June Weather | 23°C (73°F) | 137 mm (5.4 inches) | 81% | extreme |
| July Weather | 24°C (76°F) | 76 mm (3.0 inches) | 81% | very high |
| August Weather | 23°C (73°F) | 66 mm (2.6 inches) | 77% | very high |
| September Weather | 20°C (68°F) | 116 mm (4.6 inches) | 73% | very high |
| October Weather | 11°C (53°F) | 142 mm (5.6 inches) | 75% | high |
| November Weather | 3°C (38°F) | 47 mm (1.8 inches) | 85% | moderate |
| December Weather | -1°C (31°F) | 39 mm (1.6 inches) | 83% | moderate |