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).
Cheapest current propane price: Nebraska currently has the lowest average propane price at an average of $1.876 per gallon. Lowest variation between current and former propane prices: in New Hampshire, the current propane price is 4.86% lower than it was over the same period in 2012.