From Dec. 23, 1946 through Jan. 15, 1947, Seattle had 24 straight days with low temperatures at or below freezing. Or even worse, the year of 1972, which had two long streaks of lows at 28 or lower -- one to start the year (12 days between Jan. 24 and Feb. 4) and one to end it (10 days between Dec. 4 and Dec. 13.)
That December streak also holds the No. 2 spot of consecutive days of temperatures at or below freezing all day long with nine. Jan 21-Jan 30, 1969 holds the top spot at 10 straight days.