Husband had colonoscopy this morning..fever started approx. 6 hours after procedure..100.8. no pain just fever..is this normal..fever now 99.6?

If fever goes again: to 100 or above call the doctor who did the colonoscopy.

Not expected: did he have any interventions done? sometimes with a polypectomy or biopsies there can be some focal inflammation (serositis). the fever could also be a marker of something a lot more serious like a perforation though. keep a close eye on him, and I'd give the gastroenterologist the heads-up sooner rather than later.