I usually get heart palpitations normally and tests say my heart is "perfectly normal"i don't see how but anyway why do they get worse in cold weather?

Healthy life style: 1. Evaluation of cardiac structure, function 2.. Holter monitoring to r/o arrhytmia 3. Stress testing to evaluate BP nad hr during exercise 4. Tsh, k, mg anemia r/o 4. Sleep enough, be happy.

Palpitations: These are caused by many things. Stress, excitement, irritants both physical and chemical, pressure like a hiatal hernia or esophageal push or pull, and primary heart things, the causes are very many in number.