Hottest and Coldest Temperatures Ever in Washington DC on December 30

On December 30th, Washington D.C. experienced a range of temperatures, with the highest recorded temperature on this date being 70.0°F in 1990 and the lowest recorded temperature being 14.0°F in 1962. The average temperature for this day is 38.45°F, with an average high of 45.76°F and an average low of 31.15°F. In 1990, when the temperature reached its highest, an interesting news item was that the "Clean Air Act Amendments" were signed into law, aiming to reduce air pollution and protect the environment.