The average price for a gallon of gas in Montana is up during the second week of January, even though prices fell for the country at large.

"Gas prices actually increased ever so slightly, even as the national average really went down four-tenths of a penny," said petroleum analyst Patrick DeHaan. "Overall, even though Montana was up, this is kind of the time of year when gas prices are pretty quiet; not that the polar vortex had any sort of lasting impact on prices, but gasoline prices are really in a freeze right now too."

Dehaan said prices right now are remarkably consistent with the past.

"Over the last month, and compared to a year ago, prices are just about at $3.00 a gallon, Montana today is at $3.01, yesterday was at about $3.01, a week ago at $2.99, a month ago, at $3.00, and a year ago at $3.03," DeHaan said. "So by and large it's a pretty quite time at the gas pump."

Dehaan expects prices to stay stable throughout the week. Montana still has the lowest average price for gas, followed by Oklahoma and Missouri.