Hottest and Coldest Temperatures Ever in Washington DC on September 17

On September 17th in Washington D.C., temperatures have been quite variable over the years. The record high temperature was a scorching 96.1°F in 1991, while the coldest recorded temperature was a chilly 46.9°F in 1986. On average, this date sees temperatures around 69.97°F, with a daily high of 74.86°F and a low of 65.08°F. In a fascinating news item from 1986 when the coldest temperature was recorded, the Soviet Union launched the space probe Vega 2, which successfully reached and explored Venus, providing valuable insights into our neighboring planet.