May 2020 was the warmest month of May on record 1 with global temperature records going back to 1880, according to the National Oceanic and Atmospheric Administration. Of the 140 years of records, all ten of the warmest Mays have been in recent years. While it didn’t feel especially warm locally, most of unseasonably warm atmosphere and water this year was felt in Asia.
Locally here on both sides of the Delaware Bay coastline it felt like a cold, wet and windy month. We were wearing winter coats outside into the beginning of the 4th week of May. Other signs in nature, like annual crab migration, wild and agricultural plant germination and marsh grass growth, indicated a delayed or slower month of May than we’ve seen in other recent years.
1 Actually May 2020 is reported tied with May 2016 as the warmest months of May on record