If the cold weather does wane sooner than expected, natural gas may have a long advance ahead. [Cold Weather Heats Up Natural Gas ETFs.]

Aside from UNG, other ways to play natural gas include United States 12-Month Natural Gas (NYSEArca: UNL), which owns futures across the 12-month curve, and First Trust ISE-Revere Natural Gas (NYSEArca: FCG), which owns natural gas-producing companies.

If you’re feeling really bullish, check out Direxion Daily Natural Gas-Related Bull 2x Shares (NYSEArca: FCGL).

Tisha Guerrero contributed to this article.