Hottest and Coldest Temperatures Ever in Boston on September 11

On September 11th in Boston, the weather varied significantly over the years. The record high temperature occurred in 1983, reaching a scorching 99.0°F, while the record low temperature of 46.9°F was observed in 1967. On average, the temperature for this date is 67.09°F, with an average high of 71.11°F and an average low of 63.08°F. A notable news item from the past is that in 1983, the same year as the record-high temperature, the iconic Boston Celtics won the NBA Championship, solidifying their dominance in basketball during that era.