 The coldest month of the year is January, with an average low of 16.5 °F and an average high of 34.3 °F.Temperature variations between night and day tend to be relatively large during summer with a difference that can reach 30 °F, and fairly limited during winter with temperatures hovering at or below freezing for most of the day, and often dipping below zero at night.Temperatures generally drop significantly in October, while rainfall rises from less than half an inch to nearly 5 inches average per month.