Not surprisingly, the United States Natural Gas Fund, LP (NYSE: UNG) is up 23.2 percent and the VelocityShares 3X Long Natural Gas ETN linked to the S&P GSCI Natural Gas Index Excess Return (NYSE: UGAZ) is up 75.9 percent in that time.

The VelocityShares 3x Inverse Natural Gas ETN linked to the S&P GSCI Natural Gas Index Excess Return (NYSE: DGAZ) is down 51.2 percent.

Why is gas so hot? The air is getting cooler.

Consensus extended winter weather forecasts for North America have shaved off a few degrees in recent weeks, suggesting strong gas demand this winter. Expectations for gas demand have taken a sharp 180-degree turn of late. Fall in the U.S. was seasonably warm, but meteorologists are now anticipating a colder winter, which is bullish news for gas investors.

“Warm temperatures and high pressure over northern Canada in the polar stratosphere is reflected in the troposphere with ridging/positive geopotential height anomalies,” a new Atmospheric and Environmental Research report reads.

“This is forcing a deepening trough/negative geopotential height anomalies in Southwestern Canada and the Northwestern U.S. ad well below normal temperatures.”

Of course, the election has also provided a boost for natural gas stocks as well. The market believes President-elect Donald Trump’s emphasis on domestic energy, deregulation and corporate tax cuts will be good news for U.S. oil & gas stocks.