Definition of Fever Studies have found that the maximum normal oral temperature is 37.2ºC (98.9ºF) at 6 A.M. and 37.7ºC (99.9ºF) at 4 P.M.; these values define the 99th percentile for healthy individuals. Hence, an A.M. temperature of >37.2ºC (>98.9ºF ) or a P.M. temperature of >37.7ºC (>99.9ºF) would define … Continue reading Fever : Definition, Mechanism and Types