Hello and thanks for the query
Your problem is most likely to be related to dust unless you have a previous history of cough
in changing climate. To get rid from it do steam inhalation 3-4 times per time and try to expel out phlegm as much as you can. In addition to this take expectorant cough syrup, anti-allergic drugs and protect yourself form dust and other pollen's. If you have fever
or yellow phlegm than you need a course of antibiotic. Consult your physician and get treated immediately.