Perambalur experiences a warm and humid climate throughout the year, with temperatures gradually increasing from winter to summer. During winter months of January and February, days are mild with average highs around 27-28°C, while nights remain relatively cool at around 19-20°C. As spring approaches in March and April, temperatures rise sharply, often reaching as high as 40°C during the day. The heat intensifies further from May to June, with temperatures frequently hitting 38-40°C, and remains consistent until September. Autumn months of October and November see a slight drop in temperature, but still experience warm days and cool nights.