In the high-pressure area it is mostly likely that there is sun. In low pressure area it is mostly likely that rain will occur.
Because of the law that
p * V = (c) * T where
p is pressure,
V is volume,
T is temperature and
(c) is a constant value, for the same
T temperature, lowering pressure
p should lead to increase volume of the gas (air in this example).
Ant vice versa: lowering volume
V leads to increase
p pressure. The gas should be guided to condensation and the rain.
So using this basic formula high pressure area should be more likely to cause rain.
Where am I thinking wrong? Are there too many simplifications?