Planning for the weather is a good way to make your trip to Nunukan relaxing and enjoyable, especially when you're splurging. The hottest months are usually April and May, with an average temperature of 27°C, while the coldest months are February and July, with an average of 26°C. The snowiest months in Nunukan are May, April, January and February, with each month seeing an average of 64 cm of snowfall.