When I turn a Led on, my Temp sensor increase 2C higher!

I am using a temp sensor LM35/TMP36 but I noticed something important:

a) My temp is 30C (300mV to A0) but when I turn on a LED my temperature is increased to 32C (320mV to A0).

Would you know what it is happenning?

Its not funny, I am doubting on the real temperature.

@jonamleonel, if your temperature sensor is near a component that may get warm with the LED being on, then it is quite normal for that to happen. Also, did you search this forum regarding the use of the LM35 and/or the TMP36?