Brownsville Weather In September
The hottest September day in Brownsville for the past 72 years was 105 degrees Fahrenheit, on September 3, 2000, and the average high is 89. The lowest documented temperature in September for Brownsville for the past 72 years was 51 most recently registered on September 29, 1909, and the average low daily temperature is 73.
United States National Weather Service historical Brownsville September weather data indicates that on September 21, 1991, the measured high temperature did not exceed 66 degrees Fahrenheit, the lowest high measured in Brownsville in the past 72 years. NWS data also shows that on September 22, 2000, the lowest measured temperature on that day did not drop below 82 degrees, the highest low temperature measured in Brownsville in the last 72 years.
Historical weather data accumulated by the National Weather Service shows that the average daily high temperature in Brownsville on September First is 93 degrees Fahrenheit and the average high on the last day of September is 88 degrees. The low recorded temperature in Brownsville on September First averages 75 degrees Fahrenheit and the low temperature on the final day of September averages 69 degrees.
Brownsville typically receives an average of 5.31 inches of precipitation during the month. According to September Brownsville Weather records, the most rain measured in a single day in September was 12.09 inches on September 20, 1967.