Yogyakarta average temperature at afternoon and night is for about 23 degree Celcius since the beginning of June 2011 and even 22 degree Celcius at 07:00 morning in first week of August 2011. It's quite cold for some locals.
Now in the mid of October 2011 the temperature is very-very hot. At 0800 o'clock in the morning, we have 28 degree Celcius. It feels sticky on the skin because of the humidity.