Weather By Day

September Waterloo Weather 
September Waterloo Weather
Record High: 98°F
Normal High: 75°F
Normal Low: 50°F
Record Low: 22°F
Avg Monthly Rain: 2.95"
Rec 1 Day Rain: 3.08"

Waterloo Weather In September

The record high temperature in Waterloo for the last 62 years in September was 98 degrees Fahrenheit, measured on September 11, 2000, and the average high is 75. In the last 62 years the highest reported temperature in Waterloo for September was 22 registered on September 29, 1967, and the average low daily temperature is 50.

United States NWS historical Waterloo September Weather data records that on September 29, 1985, the high temperature did not exceed 44 degrees Fahrenheit, the lowest high measured in Waterloo in the past 62 years. Weather Service records additionally indicate that on September 7, 1985, the low for the day was not measured below 74 degrees, the highest low temperature recorded in Waterloo in the last 62 years.

Historical weather data accumulated by the National Weather Service shows that the average daily high temperature in Waterloo on September First is 80 degrees Fahrenheit and the average high on the last day of September is 71 degrees. The average daily low temperature in Waterloo on September First is 56 degrees Fahrenheit and the average low on the last day of September is 45 degrees.

Waterloo receives an average of 2.95 inches of precipitation during September. The most precipitation recorded on a single day in September, according to September Waterloo Weather data, was 3.08 inches on September 21, 1950.