San Jose Weather In September
The hottest September day in San Jose for the past 55 years was 104 degrees Fahrenheit, most recently measured on September 14, 1971, and the average high is 81. In the last 55 years the lowest measured September temperature in San Jose was 42 on September 30, 1950, while the typical low recorded temperature is 56.
US National Weather Service San Jose September Weather data records that on September 27, 1998, the high temperature did not exceed 65 degrees Fahrenheit, the lowest high measured in San Jose in the past 55 years. The Weather Service additionally shows that on September 4, 1950, the low for the day did not drop below 73 degrees, the highest low temperature in San Jose in the last 55 years.
National Weather Service records indicate that the high temperature in San Jose on September First averages 67 degrees and the high on the last day of the month averages 64 degrees. The low measured temperature in San Jose on September First averages 50 degrees and the low on the last day of the month averages 48 degrees.
San Jose usually receives an average of 0.19 inches of rain during September. The most precipitation recorded on a single day in September, according to September San Jose Weather data, was 2 inches on September 18, 1959.