The official numbers are calculated and September 2015 was third warmest in 110-years of record-keeping in the Hartford area.
The final average temperature for the month came in at 68.5-degrees, only behind 1921 and 1961. The average temerature for the month is calculated by taking the average of the 30 highs and lows for the month.
The month also included the first September heat wave since 1983, when September 7, 8 and 9 all hit at least 90-degrees.
The year's highest high temperature also occured during the month of September, when the eighth day of the month peaked at 96-degrees.