Monday, July 31, 2017

Are Days With Oppressively High Dew Points More Common Now?

In June, days with dew points higher than 70 were more common in the 1950s and the 1990s/early 2000s than in the last 15 years.


In July (two graphics above) 12 years since the late 1940s had at least 15 days with 70 degree dew points. The peak in the data period was over a 25 year period from the late 1970s through the early 2000s. We have trended below normal since the early 2000s in August.

In August, spikes of 70 degree dew points in August in the 1980s through the early 2000s. Small peaks in the late 1950s, 1980s and late 1990s in September with a small peak in the last 7 years.

How about 80 degree dew points?

Its only happened three times since the late 1940s. Twice in 1995 and once in 1998