Physiologically Himachal Pradesh can be divided into Five Zones.

 Wet Sub temperate Zone :-

Dalhousie, dharamshala, Palampur, Baijnath, Jogindernagar. 

Humid Sub-temperate zone:-

Kullu, Shimla, some parts of Mandi, Solan, Chamba, Kangra & Sirmaur. 

Dry temperate Zone:-

Alpine high parts of lahul Spiti, Pangi, kinnaur. 

Humid sub tropical zone :-

Mandi, Nahan, Nalagarh, Nurpur etc. 

Sub-Humid tropical zone:-

Paonta Sahib, Indore area of kangra.