The October contract settled down 0.75% on Tuesday to end at $3.949 per million British thermal units.
Natural gas futures were likely to find support at $3.732 per million British thermal units, the low from Aug. 17, and resistance at $4.172, the high from July 14.
Updated weather forecasting models called for seasonably warm temperatures across most of the country for the coming days, with parts of the eastern and central U.S. seeing above-normal mercury readings into the first week of September.
Supplies remained in focus as well.
Inventories rose by 65 billion cubic feet in the same week a year earlier, while the five-year average change is a build of 58 billion cubic feet.
Injections of gas into storage have surpassed the five-year average for 18 consecutive weeks, alleviating concerns over tightening supplies.
Elsewhere on the NYMEX, light sweet crude oil futures for delivery in October were down 0.40% at $93.48 a barrel, while heating oil for October delivery were down 0.28% at $2.8409 per gallon.