A positive lapse rate is one in which temperature decreases with height. (realclimate.org)
The average high temperature decreases by a few degrees to 88 °F (31 °C) while the average low temperature goes down to 75 °F (24 °C). (vacationidea.com)
If we take a baseline of the last 7000 years, until recently, global temperature decreased at a rate of 0.01 °C per century. (newscientist.com)