The Weather Center at Western Connecticut State University says the average winter temperature on the Fahrenheit scale is 31.8 degrees, spring 47.7 degrees, summer, 70.1 degrees and fall, 52.9 degrees. According to weather.com, the average high in July is 84 degrees, and the average low is 17 degrees in January. The record high was 102 degrees in July 1995. The record low was 18 degrees below zero in January 1982.