Investing.com - U.S. natural gas futures started the week on an upbeat note on Monday, as traders reacted to forecasts showing a return to colder weather after a warm spell in the eastern U.S.
Cooler temperatures will return during the second half of this week across the east-central U.S. through the weekend after trending warmer last week.
Looking further ahead, weather systems with cooler than normal temperatures will linger across the northern and eastern U.S. through the first week of November.
Bullish speculators are betting that the cold weather will increase early-winter demand for the heating fuel.
U.S. natural gas futures jumped 8.3 cents, or around 2.9%, to $2.998 per million British thermal units by 8:50AM ET (1250GMT).
Futures lost about 2.8% last week as a bearish weather outlook led to a dip in heating demand.
Gas futures often reach a seasonal low in October, when mild weather weakens demand, before recovering in the winter, when heating-fuel use peaks.
The heating season from November through March is the peak demand period for U.S. gas consumption.
Market participants looked ahead to this week's storage data due on Thursday, which is expected to show a build in a range between 62 and 72 billion cubic feet (bcf) in the week ended October 20.
That compares with a gain of 51 bcf in the preceding week, a build of 73 bcf a year earlier and a five-year average rise of 75 bcf.
Total natural gas in storage currently stands at 3.646 trillion cubic feet (tcf), according to the U.S. Energy Information Administration. That figure is 179 bcf, or around 4.9%, lower than levels at this time a year ago and 35 bcf, or roughly 1%, below the five-year average for this time of year.
Analysts estimated the amount of gas in storage would end the April-October injection season at 3.8 tcf due primarily to higher liquefied natural gas shipments abroad. That would fall short of the year-earlier record of 4.0 tcf and the five-year average of 3.9 tcf.