Welcome Jonw37!
Everybody above gave great advice and from my experience I can only repeat what others have said about being cautious and moving or providing shade during the hottest/sunniest part of the day. Not all semps are created equal and I have found that some can take more sun than others. My arachnoid-type semps don't fare well in full sun. Those semps that I can't move, I throw a large shade cloth over them in the afternoon when the summer heat and rays are at their highest. Watering can be done early morning or evening.
