2010 on Track to be Wettest Year on Record in San Juan

 

Through June 30th, 2010, a record 40.44 inches of precipitation had accumulated at the Luis Muñoz Marin International Airport in San Juan. This wet start to 2010 is more than two inches ahead of the next closest year since 1956. This 40.44 inches is also more than double the normal precipitation of 19.98 inches received through the end of June. A list of the top 5 wettest starts to a year can be found below.

 

Wettest Years in San Juan through June 30th

Precipitation

Year

40.44"

2010

38.20"

1956

37.20"

1958

36.65

1987

34.89

2005

 

This unusually wet start to 2010 has not been limited to San Juan. Through July 2nd, Puerto Rico as a whole is averaging nearly 150% of its normal precipitation and the U.S. Virgin Islands are running an astounding 165% of their normal precipitation (see the latest COOP data). A plot of the rainfall from across Puerto Rico through July 2nd, 2010 is shown below. (Note the large spike in precipitation near the end of the plot which clearly shows just how significant the early season active tropical wave in mid June was on precipitation totals locally).

 

Graphical display of Puerto Rico Island Averaged Rainfall from January 2nd through July 2nd, 2010

 

For a complete recap of the local climate data for the month of June 2010 (as well as previous months), please see the local data/records section of our climate web page.

 


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