Bhairahawa's climate varies significantly with the seasons. Winters are mild, with temperatures ranging from 10-15°C during December and January, making it a pleasant time of year. Spring arrives in March, bringing average highs of around 21°C, while summer months see temperatures soar to 38-40°C from May to June. The monsoon season brings heavy rainfall from July to September, with August being the wettest month. Autumn is mild and pleasant again, with temperatures ranging from 15-25°C from October to November.