The temperature of the Annapurna Region during your circuit trek depends completely on the time of the year you decide to embark on this adventurous journey. If you are taking this trek during the autumn season, the average temperature will be 2-3 degrees celsius and it decreases to minus temperature during the night.
As per the spring season, the average temperature of the Annapurna Region is 20 degrees celsius. However, the temperature decreases as you get higher up.
However, during the winter season, the temperature is always on a negative scale so it is very cold.