Temperatures also vary depending on which method you use to take your temp. I can't remember what the variations are tho.
I use a tympanic (ear) thermometer.

My temp is usually in the high 97-98 degree range, but I've been getting a lot of readings in the mid 99's-low 100 range for a bout a year. Occasionally I will spike a fever around 102, but it usually lasts about a day and goes away on its own.