From the correlation plot it is evident that there is a positive correlation between:
Max.Temperature and Temp.Dry.Bulb
Temp.Dry.Bulb and Temp.Wet.Bulb
Temp.Wet.Bulb and Min.Temperature
There is a negative correlation between the following variables:
Relative Humidity and Max.Temperature
Relative Humidity and Temp.Dry.Bulb
Relative Humidity and Pan.Evaporation