If global warming is going on, how come I am wearing a long-sleeved flannel shirt on a July afternoon?

If Global warming is occurring in the World, than nobody knows where Laredo Texas is located, every year when winter pes through, which is on March, we start to get some hot spells that you wouldn't believe, sometimes the weather climbs to 86 degrees, and it gets hot and sticky than the next day it gets cold again.