Meteorological variables, such as rainfall, could covariate with other variables and these
covariation patterns should have strong seasonal and geographical dependences. Wet
condition in southern Thailand, having coastal influence, can have different structure from
that in the North, located in mountainous mainland. Factor analysis using Varimax rotation
method on correlation matrix was performed for wind speeds, temperatures, relative
humidity, and rainfall for different geographical regions. The analysis provides major
underlying factors influencing those measurements. Investigating underlying factor patterns
and spatial–temporal distribution of the factor scores can facilitate understanding common
Thailand climate structure.