Planning for the weather is an important factor for making your trip to Ayer Keroh a success, especially when you're splurging. The hottest months are usually March and April, with an average temperature of 27°C, while the coldest months are January and February, with an average of 27°C. The rainiest months in Ayer Keroh are November, December, October and May, with each month seeing an average of 260 mm of rainfall.