Bloomberg News

Weekend Temperatures to Near the 90s in U.S. Midwest

May 18, 2012

Temperatures across the U.S. Midwest will rise to 90 degrees Fahrenheit (32 Celsius) this weekend, then dip briefly until a new round of heat moves into the region by the end of next week.

St. Louis may see 90 in two days, while temperatures in Chicago are expected to reach at least 89, according to the National Weather Service. The warmth will probably increase electricity use by 60 percent or more throughout the region in the coming week, said David Salmon of Weather Derivatives in Belton, Missouri.

Temperatures from the Great Plains to Quebec may be 8 degrees above normal from May 23 to May 27, said Matt Rogers, president of Commodity Weather Group LLC in Bethesda, Maryland.

The weather service is predicting rain and temperatures in the 60s and 70s from Philadelphia to Boston to start next week. Highs may reach 86 in Montreal and Ottawa and 79 in Toronto this weekend, according to Environment Canada.

High temperatures create spikes in electricity demand as people turn to air conditioners to cool homes and businesses. The low price of natural gas has meant more power plants are using the fuel to generate energy.

The largest draws on electricity occur when hot weather descends on large cities.

The normal average temperature in New York on May 29 is about 67 degrees, according to MDA EarthSat Weather in Gaithersburg, Maryland. It’s 61 in Boston; 69 in Washington; 74 in Atlanta; 79 in Houston; 77 in Dallas; 58 in Seattle and 67 in Burbank, California.

To contact the reporter on this story: Brian K. Sullivan in Boston at

To contact the editor responsible for this story: Dan Stets at

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