Why does hot weather tend to give high pressure readings ?
Wasn't sure where to put this so please feel free to move it if necessary.
From what I know, hot weather means there will be less dense air in an area and so wouldn't that mean a lower reading for atmospheric pressure ? How comes it usually gives readings above 1013 hpa though ? I'm equally confused by cold weather and how it tends to give readings below 1013, wouldn't the thicker air mean more air molecules and so a high atmospheric pressure ? Thanks !