Friday, June 15, 2012

A Less Aggressive Heat Pace This Summer

It might be the warmest start to a year on record but we're likely on a pace that will not break summer heat records in 2012.  Of course, we're not terribly far into the warm season and much can change but we are a good number of days behind the heat pace that was set out in 2010 and 2011 for 90 degree days.  So far this year we have three days or 90 degree weather or warmer in Philadelphia, which is about "average" for the last 30 years through Flag Day and blends in pretty well with the numbers from the past nine years as four other years in the data set had three days of 90+ to this point.

We are behind 2010 and 2011 on not only the number of 90 degree days, but also the number of 80 degree days as well.  We're one behind 2011 and four days behind 2010 in terms of the number of 80+ days we've experienced in Philadelphia through June 14th.  The average of the past nine years is 22.6, which puts this year a bit ahead of that pace.

You'll notice one statistic that we share with 2010 -- we don't have any days of 95 degrees or hotter so far.  Our warmest day this year was on Sunday (94).   We've had just six days of 95+ over the past nine years through June 14th, which surprised me somewhat...I had thought given the plethora of warmer summers we've had over the past few days we would have knocked out a few more hot days in the mix.  The year, going back through 1874, with the most 95+ days to this point is 1925 (seven)...which also happens to be the year with the earliest 100 degree day in Philadelphia (June 5th).

Believe it or not through yesterday we're running 0.8 degrees below average this month.  The fair weather stretch we're enjoying will help us maintain a pace at or slightly below average for the next couple of days.