Bettiah experiences a moderate climate with distinct seasonal variations. Winters are cool and dry, with temperatures ranging from 7-20°C in January, gradually warming up to 15-36°C by March. Spring brings slightly warmer days, with temperatures peaking at 38°C in April and May. Summer months of June to September see consistent temperatures around 30°C, while autumn ushers a slight cooling trend, with temperatures ranging from 17-29°C in November. The winter chill returns in December, with temperatures dipping to as low as 9°C.