I had lateral epicondylar release with tendon repair 7 months ago & when my arm get cold it hurts until I get it warmed up. Is that normal?

Unusual but possible. Tennis elbow surgery – lateral epicondylitis release and repair, is commonly associated with a protracted time to recover. At seven months though, i would expect most soft tissue changes from surgery to have recovered and remodeled. Pain associated with hypothermia suggests relative poor circulation to the tissue that improves with heat and revascularization; frictional rubbing helps with both.