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).
Price hikes went beyond propane. The average U.S. tab for heating homes with natural gas is projected to jump 10% to $663 while the cost for using oil will rise 7% to $2,243 and for electricity, 5% to $934.