July is the warmest month, with a daily average temperature of 74.2 °F (23.4 °C). Summers range from mild to hot with occasional, sometimes severe, afternoon thunderstorms and high temperatures reaching 90 °F (32 °C) on 38 days annually, and occasionally 100 °F (38 °C). December, the coldest month of the year, has a daily average temperature of 29.9 °F (−1.2 °C). Winters consist of periods of snow and very low temperatures alternating with periods of milder weather due to the warming effect of Chinook winds. In winter, daytime highs can exceed 60 °F (16 °C) but also often fail to reach 32 °F (0 °C) during periods of cold weather and can even fail to rise above 0 °F (−18 °C) on occasion. On the coldest nights of the year, lows can easily fall to −10 °F (−23 °C) or below. Snowfall is common throughout the late fall, winter and early spring, averaging 53.5 inches (136 cm) for 1981–2010. The average window for measurable (≥0.1 in or 0.25 cm) snow is October 17 through April 27; however, measurable snowfall has fallen in Denver as early as September 4 and as late as June 3. Extremes in temperature range from −29 °F (−34 °C) on January 9, 1875, up to 105 °F (41 °C) as recently as June 29, 2018. Due to the city's high elevation and aridity, diurnal temperature variation is large throughout the year.
In 1970, Denver was selected to host the 1976 Winter Olympics to coincide with Colorado's centennial celebration, but in November 1972, Colorado voters struck down ballot initiatives allocating public funds to pay for the high costs of the games, which were subsequently moved to Innsbruck, Austria. The notoriety of becoming the only city ever to decline to host an Olympiad after being selected has made subsequent bids difficult. The movement against hosting the games was based largely on environmental issues and was led by State Representative Richard Lamm, who was subsequently elected to three terms (1975–87) as Colorado governor. Denver explored a potential bid for the 2022 Winter Olympics, but no bid will be submitted. In 2010, Denver adopted a comprehensive update of its zoning code. The new zoning was developed to guide development as envisioned in adopted plans such as Blueprint Denver, Transit Oriented Development Strategic Plan, Greenprint Denver, and the Strategic Transportation Plan.
MediaNews Group purchased the Denver Post in 1987; the company is based in Denver. The Gates Corporation, the world's largest producer of automotive belts and hoses, was established in S. Denver in 1919. Russell Stover Candies Inc. made its first chocolate candy in Denver in 1923, but moved to Kansas City in 1969. The Wright & McGill Company has been making its Eagle Claw brand of fishing gear in NE Denver since 1925. The original Frontier Airlines began operations at Denver's old Stapleton International Airport in 1950; Frontier was reincarnated at DIA in 1994. Scott's Liquid Gold, Inc., has been making furniture polish in Denver since 1954. Village Inn restaurants began as a single pancake house in Denver in 1958. Big O Tires, LLC, of Centennial opened its first franchise in 1962 in Denver. The Shane Company sold its first diamond jewelry in 1971 in Denver. Johns Manville Corp., a manufacturer of insulation and roofing products, relocated its headquarters to Denver from New York in 1972. CH2M HILL Inc., an engineering and construction firm, relocated from Oregon to the Denver Technological Center in 1980. The Ball Corporation sold its glass business in Indiana in the 1990s and moved to suburban Broomfield; Ball has several operations in greater Denver.
The Colorado Rockies were created as an expansion franchise in 1993 and Coors Field opened in 1995. The Rockies advanced to the playoffs that year, but were eliminated in the first round. In 2007, they advanced to the playoffs as a wild-card entrant, won the NL Championship Series, and brought the World Series to Denver for the first time but were swept in four games by the Boston Red Sox.
As of the 2010 census, the population of the City and County of Denver was 600,158, making it the 24th most populous U.S. city. The Denver-Aurora-Lakewood, CO Metropolitan Statistical Area had an estimated 2013 population of 2,697,476 and ranked as the 21st most populous U.S. metropolitan statistical area, and the larger Denver-Aurora-Boulder Combined Statistical Area had an estimated 2013 population of 3,277,309 and ranked as the 16th most populous U.S. metropolitan area. Denver is the most populous city within a radius centered in the city and of 550-mile (890 km) magnitude. Denverites is a term used for residents of Denver.