Last updated: June 24, 2025
In December, the average temperature in Brownsville, United States hovers around 8°C (46°F). Visitors can expect a wide range of temperatures, with minimums plummeting to -10°C (14°F) and maximums soaring to 24°C (76°F). Additionally, prepare for 144 mm (5.7 in) of precipitation over approximately 10 days, and a high average humidity of 88%, creating a notably damp atmosphere.
In December in Brownsville, the average temperature is 8°C (46°F), with maximums reaching 24°C (76°F) and minimums dropping as low as -10°C (14°F). This range provides an opportunity for travelers to experience a diverse climate, so be sure to pack accordingly for both warm and cold activities.
In Brownsville in December, the precipitation amount is 144 mm (5.7 in) over a duration of 10 days.
In Brownsville in December, humidity is 88%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much more uncomfortable than the temperature alone would suggest.
In Brownsville 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 Brownsville, you can check the information here.
UV Risk Categories
Weather in Brownsville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Brownsville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 5°C (42°F) | 99 mm (3.9 inches) | 86% | moderate |
| February Weather | 7°C (46°F) | 171 mm (6.7 inches) | 85% | high |
| March Weather | 12°C (55°F) | 166 mm (6.5 inches) | 84% | high |
| April Weather | 16°C (61°F) | 143 mm (5.6 inches) | 81% | very high |
| May Weather | 22°C (71°F) | 103 mm (4.1 inches) | 83% | very high |
| June Weather | 26°C (78°F) | 103 mm (4.1 inches) | 83% | extreme |
| July Weather | 27°C (81°F) | 123 mm (4.9 inches) | 80% | extreme |
| August Weather | 26°C (79°F) | 116 mm (4.6 inches) | 73% | very high |
| September Weather | 24°C (75°F) | 113 mm (4.5 inches) | 70% | very high |
| October Weather | 18°C (64°F) | 111 mm (4.4 inches) | 73% | high |
| November Weather | 10°C (50°F) | 79 mm (3.1 inches) | 85% | moderate |
| December Weather | 8°C (46°F) | 144 mm (5.7 inches) | 88% | moderate |