Dew point is the tempurature the air cannot hold the weight of the water in it. The water then begins to condense and form droplets. This tempurature is always below or equal to the air tempurature.
Propane prices. Maine (ME) propane users spent an average of $2.724 per gallon over the 2012-2013 heating season. This is slightly higher than the 2.436 average for the country as a whole, for the reasons explained above (distance from major supply source, colder climate, higher demand).
The propane price per gallon today is lowest in Iowa, where propane gas costs an average of $1.525 per gallon. And compared to last year, the propane price per gallon today is lowest in New Hampshire, where the average propane price has decreased by 3.5% since the same period in 2012.