Hottest and Coldest Temperatures Ever in Boston on September 17

On September 17th in Boston, the temperature ranges from a high of 67.66°F to a low of 58.13°F, with an average temperature of 62.89°F. Historically, the hottest temperature ever recorded on this date was 89.1°F in 1991, while the coldest temperature was 44.1°F in 2013. In 1991, an interesting news item was that the world's first website was launched by Tim Berners-Lee, revolutionizing the way we access and share information globally.