Planning for the weather is an important factor for making your trip to Taman Istana a success, especially when you're splurging. The hottest months are usually May and June, with an average temperature of 26°C, while the coldest months are January and December, with an average of 25°C. The rainiest months in Taman Istana are November, December, October and April, with each month seeing an average of 378 mm of rainfall.