Weather By Day

September Flagstaff Weather 
September Flagstaff Weather
Record High: 90°F
Normal High: 74°F
Normal Low: 42°F
Record Low: 22°F
Avg Monthly Rain: 2.12"
Rec 1 Day Rain: 2.84"
Avg Monthly Snow: 0.1"
Rec 1 Day Snow: 2"

Flagstaff Weather In September

The highest recorded temperature for Flagstaff for the past 61 years in September was 90 degrees Fahrenheit, registered on September 1, 1950, and the regular high is 74. In the last 61 years the lowest measured September temperature in Flagstaff was 22 most recently registered on September 26, 1934, and the typical low is 42.

US National Weather Service historical Flagstaff September Weather data records that on September 24, 1986, the high temperature did not exceed 41 degrees Fahrenheit, the lowest high measured in Flagstaff in the past 61 years. Weather Service records additionally indicate that on September 24, 1897, the low for the day was not measured below 62 degrees, the highest low temperature recorded in Flagstaff in the last 61 years.

NWS data indicates that the daily high temperature in Flagstaff on September First averages 77 degrees Fahrenheit and the high on the last day of September averages 71 degrees. The average daily low temperature in Flagstaff on September First is 46 degrees Fahrenheit and the average low on the last day of September is 36 degrees.

Flagstaff usually receives an average of 2.12 inches of rain during September. September Flagstaff Weather records indicate that on September 5, 1970 Flagstaff received 2.84 inches of precipitation, the highest amount of rain recorded in a single day in September. Flagstaff averages 0.1 inches of snow in September.On September 29, 1905 Flagstaff received 2 inches of precipitation, the highest snowfall recorded in a single day in September.