This is your 100th post, or so it seems, on the flip of script between March 2012 and March 2013. You know that temperatures this March will end up below average...and it comes as a bit of a shock to the system given how mild March 2012 was.
Just from a shear standpoint of measuring 50 and 70 degree days, this year has been markedly colder. In Philadelphia, we had 25 days last year that had a high of 50 or higher...this year, just 10. Nearly every city has seen a marked drop in the number of days where the thermometer cracked 50 degrees -- at least half in nearly every city we've listed below and in Minneapolis' case it went from 23 to ZERO (through yesterday). They may hit 50 twice before month's end on Friday and Saturday...but the slice has been rapid and significant.
70 degree days feature drops from something to nothing. Washington had fourteen 70 degree days last year, none so far this year. Philadelphia had nine last year, none this year.
The average locally from 1981-2010 is 17.9 days of 50 or warmer, 2.46 days of 70 or warmer. This year won't hit either of those benchmarks before year's end.
I think the story in Minneapolis is rather impressive -- the month's average through yesterday was about six degrees below average while last March averaged 15.5 degrees above average for the month. We'll go from 8.7 above average last year to about two degrees below average at month's end this year...not quite as big a slap in the face but still rather notable.