Sunrise: 5:16 AM
Sunset: 8:19 PM
Length of the day:
15 hours and 3 minutes
Heat waves are a select group in May, though getting 90 degree weather does happen about once every 4 to 5 years. The heat was still simmering in Burlington on this date in 1977. After setting a record for the month of May the day before, the 23rd saw readings still at 90 or above at many stations, with 93 degrees in Morrisville and Chelsea topping the list.