<|im_start|>system
You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps.<|im_end|>
<|im_start|>user
Read this and answer the question

Detroit and the rest of southeastern Michigan have a humid continental climate (Köppen Dfa) which is influenced by the Great Lakes; the city and close-in suburbs are part of USDA Hardiness zone 6b, with farther-out northern and western suburbs generally falling in zone 6a. Winters are cold, with moderate snowfall and temperatures not rising above freezing on an average 44 days annually, while dropping to or below 0 °F (−18 °C) on an average 4.4 days a year; summers are warm to hot with temperatures exceeding 90 °F (32 °C) on 12 days. The warm season runs from May to September. The monthly daily mean temperature ranges from 25.6 °F (−3.6 °C) in January to 73.6 °F (23.1 °C) in July. Official temperature extremes range from 105 °F (41 °C) on July 24, 1934 down to −21 °F (−29 °C) on January 21, 1984; the record low maximum is −4 °F (−20 °C) on January 19, 1994, while, conversely the record high minimum is 80 °F (27 °C) on August 1, 2006, the most recent of five occurrences. A decade or two may pass between readings of 100 °F (38 °C) or higher, which last occurred July 17, 2012. The average window for freezing temperatures is October 20 thru April 22, allowing a growing season of 180 days.

What body of water affects Detroit's climate?<|im_end|>
<|im_start|>assistant

The Great Lakes influence Detroit's climate.<|im_end|>

 Based on the information provided, the body of water that affects Detroit's climate is the Great Lakes. The text states that Detroit is influenced by the Great Lakes, which moderates its climate and creates a humid continental climate (Köppen Dfa) with cold winters and warm summers. The proximity to the Great Lakes affects the temperature and precipitation patterns in Detroit, including the moderation of temperatures and the amount of snowfall.<|im_end|>
