We were in a golf torney yesterday and it started out in the 40's with everyone in pull overs and sweat shirts and only 2 or 3 of us in shorts. It only hit around 60 in the afternoon but many of us got sun burned anyway. My face got sunburned at 60 degrees WITH a ball cap on all day! Same with many of us.
Why? Because we have been so sun deprived all it took was a moderately decent day and a few hours of sun!