Lalmanirhat experiences a subtropical climate with distinct seasonal variations. During winter, temperatures range from 8°C to 28°C in January and drop to 13°C to 31°C in February, gradually warming up. Spring brings increasing warmth, with March and April temperatures soaring up to 35°C and 37°C respectively. Summer months of May to September remain hot, with temperatures hovering around 30-36°C. Autumn witnesses a slight dip in temperature, returning to cooler days by November and December, averaging around 21-24°C.