Temperature for December
In Brownsville, TX during December the average high temperature is 73.3°F. The hottest day on record was December 5, 1977 when the temperature hit 93.0°F.
Precipitation for December
In December the average monthly rainfall in Brownsville, TX is 0.75 inches with rain usually falling on between 9 and 10 days. 1948 was the driest December with only 0.00 inches of rain falling, and 2009 was the wettest December with 6.06 inches of rain. The wettest single day in December was 17 December 2009 when 2.67 inches of rain fell.
In December it usually snows on between 0 and 1 days. In December there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in December.