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).
Analysis of current propane prices trends per gallon. 1  On the whole, US current propane prices per gallon are 18.76% more expensive than they were last year.  Most expensive current propane price: Rhode Island has the most expensive propane price at an average of $3.898 per gallon.