The average daily temperature for May jumps from 54 degrees on May 1 to 64 degrees by the end of the month. There have been several days on which the mercury topped 90 degrees, the most notable being 97 degrees on May 20, 1996, which came one month after the last snow of the snowiest season on record, and 94 degrees on May 26, 2010, which was a record for the date. The record low for the month is 31 degrees, set on May 10, 1966. The warmest May on record was in 1991 when the mercury averaged 64.4 degrees.
Can it snow in May? Yes. Believe it or not, there have been two days with at least a trace of snow, including May 27, 1961, which is just over three weeks from the start of Summer! There was also a trace of snow on May 9, 1977. May is the second wettest month of the year, on average, behind March. The normal rainfall for the month is 4.03 inches, based on 40 years of record-keeping. The wettest May happened in 1989 when 9.53″ fell, while the wettest single day rainstorm delivered 3.21″ on May 29, 1968.
The amount of daylight continues to grow each day through the end of the month. There are exactly 14 hours of daylight May 1 when the Sun rises at 5:50 and sets at 7:50. However, by the end of the month, there are just about 15 hours of daylight as the Sun comes up at 5:22 and sets at 8:19. Three weeks later, on the Summer Solstice, the Sun sets at 8:30, which is only 11 minutes later than on the last day of May.
According to weather legend, "Those who bathe in May, will soon be under clay. Those who bathe in June, bathe a bit too soon." The Full Flower Moon happens Sunday, May 3, at 11:42 p.m. EDT. In most areas, flowers are abundant everywhere during this time. Thus, the name of this Moon. Other names include the Full Corn Planting Moon or the Milk Moon. Happy May!