–Natural-gas futures fall for sixth straight day –Futures settle down 6.8 cents, lowest settlement price since Aug. 20 –Warmer-than-average weather forecasts weigh on prices By Nicole Friedman NEW YORK–Natural-gas futures declined to their lowest settlement price since August as weather forecasts for unusually warm temperatures lowered expectations for gas-powered heating demand. Natural gas for December delivery settled down 6.8 cents, or 1.94%, at $3.445 a million British thermal units on the New York Mercantile Exchange, sinking to their lowest price since Aug. 20. Natural-gas prices have fallen for three straight weeks as traders digest the bearish weather outlooks. About half of U.S. households use the fuel as their primary heating source, according to the Energy Information Administration. MDA Weather Services, a Gaithersburg, Md., weather forecaster, said earlier Monday that temperatures will be warm in the eastern and central U.S. through mid-November. “Over the weekend, a few different weather models […]