Do you think the humidity has been high this year? We certainly see the impacts of high dewpoint temperatures in night-time lows, which have been much above normal this summer. Dennis Mercereau of DAMWeather has done an interesting analysis of humidity conditions in the Eastern US this year and discovered that this has been an exceptionally muggy year based on hours of high dewpoint temperatures. You can read more about his analysis and what he found at https://www.damweather.com/2018/09/this-has-been-one-of-east-coasts.html.
