San Diego Weather In September

In the last 70 years the highest measured September temperature in San Diego was 111 degrees Fahrenheit, registered on September 27, 1963, while the normal high temperature is 77. The record low September temperature in San Diego for the last 70 years was 38 most recently measured on September 19, 1934, and the average low daily temperature is 66.

United States National Weather Service historical San Diego September Weather data shows that on September 28, 1933, the high temperature did not exceed 64 degrees Fahrenheit, the lowest high measured in San Diego in the past 70 years. The Weather Service additionally indicates that on September 29, 1984, the low for the day did not drop below 78 degrees, the highest low recorded in San Diego in the last 70 years.

National Weather Service data shows that the high temperature in San Diego on September First averages 77 degrees Fahrenheit and the high on the final day of September averages 75 degrees. The average recorded low temperature in San Diego on September First is 65 degrees Fahrenheit and the average low on the last day of September is 62 degrees.

San Diego usually receives an average of 0.21 inches of precipitation during September. September San Diego Weather records indicate that on September 30, 1921 San Diego received 1.23 inches of precipitation, the highest amount of rain recorded in a single day in September.