Cessna 172 Oil Temp

I have a 1964 Cessna 172 (Continental 0300D) and the oil temp seems to be
running higher than I remember from last summer. Its still in the green but
only a needles width below the red-line. What is normal? Conditions during
the latest flight were hot and humid - temp at ground level was 92 and
relative humidity in the 90's.

The engine had all cylinders re-built a couple of months ago and I am
runnning straight mineral oil (Aeroshell 80). All of the baffles are in good
shape and the mechanic sealed all of the seams with sealant during the
cylinder rebuild.

Thanks for your help
Gary