Bukit Mertajam experiences a warm climate year-round, with temperatures consistently ranging from the mid-20s to mid-30s Celsius throughout the year. The hottest months are typically February and March, with average highs reaching up to 36°C, while the cooler months are December and January, averaging around 27°C. During these periods, temperatures fluctuate by only a few degrees, indicating minimal seasonal variation. In contrast, the summer months of June to August see consistent temperatures in the mid-20s to low 30s Celsius. Overall, Bukit Mertajam's climate is characterized by warm and humid conditions, with no distinct winter or cold season.