Temps for germenation should be around 85F. I put my seeds in paper towel, and put them between 2 plants...wrap the plate woth a black garbage bag and place them near a window...at night i just place them in a warm spot. Check daily to make sure the towel isn't dried up though...temps that warm will suck it dry if your not careful.
In soil you want the water to be the same temp as the room...too cold or hot will shock the roots and possible kill em. I usually store my water in the same room as the grow...that way it's the same temp...usually.