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).
Also, the statewide average price for propane, like heating oil, is a spot price, not a pre-buy price. The spot price for propane is based on a use of at least 900 gallons a year. Households using propane just for cooking or hot water generally pay a higher per gallon price. The table listed in our weekly price survey provides current Maine cash prices in dollars rounded to the nearest penny.