Purnea experiences a mild climate with temperatures gradually rising from the chilly winter months to the sweltering summer. Winters, from November to February, are cool with average temperatures ranging between 17-21°C, while springs, from March to May, bring pleasant warmth with averages around 27-30°C. Summers, spanning June to September, are hot and humid, with temperatures hovering around 30-35°C. As the seasons transition into autumn, temperatures drop slightly, with averages ranging from 22-28°C in October and November. The coolest period is during December and January, when the average temperature dips to around 19°C, marking the onset of winter once again.