During the year the average temperature in Karimunjawa lies between 26 until 30 degrees Celsius. The minimum temperature in Karimunjawa is around 22 degrees Celsius and the maximum 34 degrees Celsius. For more information about the current weather in Karimunjawa try weather sites.  However, do keep in mind that on an island in the middle of the sea, weather does tend to be a bit unpredictable.