Weather By Day

September Grand Junction Weather 
September Grand Junction Weather
Record High: 99°F
Normal High: 80°F
Normal Low: 50°F
Record Low: 27°F
Avg Monthly Rain: 0.91"
Rec 1 Day Rain: 1.35"
Avg Monthly Snow: 0.1"
Rec 1 Day Snow: 3.2"

Grand Junction Weather In September

The hottest September day in Grand Junction for the past 64 years was 99 degrees Fahrenheit, most recently registered on September 2, 1995, and the normal high is 80. In the last 64 years the lowest measured September temperature in Grand Junction was 27 most recently encountered on September 22, 1971, and the typical low is 50.

According to National Weather Service Grand Junction September Weather data, on September 21, 1965, the recorded high temperature did not exceed 48 degrees Fahrenheit, the lowest high measured in Grand Junction in the past 64 years. The Weather Service additionally shows that on September 2, 1995, the low for the day did not drop below 69 degrees, the highest low temperature in Grand Junction in the last 64 years.

NWS data indicates that the daily high temperature in Grand Junction on September First averages 86 degrees Fahrenheit and the high on the last day of September averages 77 degrees. The average daily low temperature in Grand Junction on September First is 59 degrees Fahrenheit and the average low on the last day of September is 48 degrees.

Grand Junction usually receives an average of 0.91 inches of rain during September. The most precipitation measured in a single day, as indicated by September Grand Junction Weather data, was 1.35 inches on September 18, 1965. Grand Junction averages 0.1 inches of snow in September. The highest snowfall measured in a single day in September was 3.2 inches on September 8, 1979.