Weather By Day

September Lewiston Weather 
September Lewiston Weather
Record High: 103°F
Normal High: 77°F
Normal Low: 51°F
Record Low: 28°F
Avg Monthly Rain: 0.81"
Rec 1 Day Rain: 1.73"

Lewiston Weather In September

The highest recorded temperature in September for Lewiston for the past 64 years was 103 degrees Fahrenheit, registered on September 2, 1950, while the normal high temperature is 77. The lowest reported temperature in September for Lewiston for the past 64 years was 28 measured on September 6, 1965, and the mean daily low in the month is 51.

According to National Weather Service Lewiston September Weather data, on September 21, 1968, the recorded high temperature did not exceed 47 degrees Fahrenheit, the lowest high measured in Lewiston in the past 64 years. Weather Service records additionally show that on September 29, 1963, the recorded low temperature for the day did not drop below 69 degrees, the highest low measured in Lewiston in the last 64 years.

NWS data indicates that the daily high temperature in Lewiston on September First averages 83 degrees Fahrenheit and the high on the last day of September averages 73 degrees. The low recorded temperature in Lewiston on September First averages 55 degrees Fahrenheit and the low temperature on the final day of September averages 47 degrees.

Lewiston usually receives an average of 0.81 inches of rain during September. September Lewiston Weather records indicated that on September 14, 1955 Lewiston received 1.73 inches of precipitation, the most rain recorded in a single day in September.