Hottest and Coldest Temperatures Ever in Washington DC on September 18

On September 18th, Washington D.C. experienced varying weather conditions throughout the years. The hottest temperature on record for this date occurred in 1970, reaching a scorching 90.0°F, while the coldest temperature occurred in 1990, dropping to a chilly 46.0°F. On average, Washington D.C. experienced a comfortable temperature of 69.89°F on this day, with a typical high of 74.11°F and a low of 65.67°F. In a relevant news item from the past, in 1970, the Washington Post reported on the unveiling of a new memorial honoring Martin Luther King Jr. on the National Mall, an important addition to the city's cultural landscape.