Delaware average temperature
Climate. Delaware's climate is moderate year round. Average monthly temperatures range from 75.8 to 32.0 degrees. Average temperature in the summer months is 74.3 degrees. About 57% of the days are sunny.Annual precipitation is approximately 45 inches.elaware's climate is moderate year round. Average monthly temperatures range from 75.8 to 32.0 degrees. Average temperature in the summer months is 74.3 degrees.