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).
KIM KOMANDO: 3 ways to lower winter electric bills. In the Midwest, the average projected tab for heating homes with propane is $2,212 this winter, compared with $1,333 for the 2012-2013 season. In the Northwest, it's even higher, $2,412, but that's less of an increase from the $1,940 of the prior year.