Coolest US Cities in Summer

by Liz Osborn © Current Results Nexus

Cool summer temperatures can be found in major cities across the continental United States. Among the country's 40 largest cities, San Francisco tops the list for usually having the coldest weather each day in June, July and August.

Major cities included in these weather rankings are all the cities in the United States with over 440,000 people on July 1, 2006, according to the US Census Bureau's estimates.

Coolest Summer Days

Every major US city has set a record high temperature of 100 °F (37.8 °C) or more. However, eleven of the biggest American cities don't reach temperatures above 82 °F (27.8 °C) during an average summer day.

Lowest Summer Temperatures

Only two large US cities have experienced freezing temperatures during summer. Denver, Colorado and Cleveland, Ohio have record June lows of 30 °F and 31 °F respectively. Temperatures in nine of the 40 major American cities drop below 62 °F (16.7 °C) on a daily basis, on average, during the summer.