Not all long sleeve shirts offer SPF protection. Read all the fine print. UA (Under Armor) offers a long sleeve T with SPF in a fabric optimized for warm weather (but of course, no pockets). I use them in temperatures over 90 degrees and high humidity. They work reasonably well. The sleeves are a little long, which is good because that lets them cover me down to the gloves. I'm not exactly sure what the differences are between UA's "Warm Weather", "Normal", and "Cold Weather" fabrics.
I never found anything that covers my legs, but so far my legs haven't had any problems. I've been considering some kind of a cover for the back of my neck and ears, but I haven't come up with any ideas that don't seem completely dorky. I once saw a gentleman with a home-made wide brim that turned his helmet into a sun hat. He didn't want to stop, so I didn't get much information other than to see the rig. So far, I've only thought of trying to do something like that. In the mean time, I favor country roads with tall trees, which is a good idea for hot weather in any event.