Hottest and Coldest Temperatures Ever in Washington DC on May 31

On 05-31, Washington D.C. experienced a weather mix ranging from the hottest recorded temperature of 99.0°F in 1991 to the coldest recorded temperature of 48.0°F in 1961. The average temperature for this date stands at 71.50°F, with an average high of 77.10°F and an average low of 65.90°F. In 1991, coincidentally the year of the hottest temperature recorded, an intriguing news item emerged. The Soviet Union officially dissolved, marking the end of the Cold War era and leading to significant geopolitical changes globally.