The pi running my webserver in the shed 50.3C
OSMC media centre Pi 49.8C
NAS Pi 41.7C
Routerstats/energy monitor Pi - oops, seems to be offline!
I use a free Android App called Raspi Check, which will give you all manner of stats from your Raspberry Pis, including temperature, uptime, CPU load..
Though clearly I don't look at it enough if I hadn't spotted (until now) that the routerstats pi was offline.
Ian