This happened about 20 years ago. I had organized an outing at Pilgrim's Oak in Southeastern PA for about 16 guys. This was a mid-week, take off from work, all-day outing. It was mid-April. The temperature started dropping on the weekend and continued down. Only two of us showed up on Wednesday - I think there were only 5 players on the course all day. After buying some additional clothes, we teed off - the temperature was 40 and dropping and the wind was between 20 and 30 mph. We finished - the only way to avoid the wind was to hide behind the hills - it was brutal.