Other regional high/low temperatures:
Washington Dulles 94/63The high at Dulles ties the record set in 1970 and 1980.
Baltimore Downtown 93/65
By 3 pm today, the temperature at Washington reached 91°, making this the 64th day of 90° or higher temperatures this year. The high so far today is the 93° reading at 4 pm.
Day 64 was achieved 2 days later than in 1980, but that year peaked out at the record annual total of 67 days on September 23. With 90° temperatures expected for the next 2 days, however, this year's heat streak is likely to go at least 1 day later. This year has already far exceeded 1980's 90° record in longevity; the first 90° day in 1980 was May 13, but this year it was almost a month earlier, on April 16.
Meanwhile, the 94° so far at Richmond and 95° at Raleigh have further extended their already broken records. This is now the 7th day of 90°+ temperatures at Raleigh out of the last 9 and the 13th in September overall. It's the 8th day this month at Richmond.
Images (click to enlarge): Cumulative annual number of days with temperatures 90° or higher in Washington, CapitalClimate chart from National Weather Service data; U.S. surface temperatures at 4 pm EDT, September 22, 2010, from Unisys