I experienced something similar lately when I flushed the radiator. The temperature was about 10% more than the usual. I also felt that the fan was not kicking in. Despite checking it, nothing could be found wrong. Then it happened yesterday when stuck in a jam - the temperature rose to 110C. I knew this is not acceptable.
Had the fans checked again and sure enough, the fan clutch was playing up. Replaced the fan clutch and the switch for good measure.
So far so good.
126 tailed by a 203, 129 leading the pack.