Planning for the weather is an important factor for making your trip to Tanjung Balai a success, especially when you're splurging. The hottest months are usually May and June, with an average temperature of 27°C, while the coldest months are January and February, with an average of 26°C. The rainiest months in Tanjung Balai are November, December, October and September, with each month seeing an average of 379 mm of rainfall.