This is probably a RodneyS question but I wonder what the largest difference is between a daily high and daily low in one calendar year at DCA/IAD/BWI.
I think 1936 may be the record for BWI- lowest temp ever recorded that year was 0 and highest recorded was 107, so thats a 107 degree difference. 1994 would be another one, with the lowest temp recorded being -5 and the highest 101, a 106 degree difference. I would think 2011 would have to be a big one too, with 8 being the lowest and 106 being the highest, a difference of 98 degrees.
With 3 degrees being our lowest so far, that means we'd have to have a high of 110 this summer to tie it. LOL