The Heard and McDonald Islands receives snowfall almost throughout the year. Here, the average summer temperature varies from 0 to 4 degree Celsius. And during winters it ranges from -0.8 to 0.3 degree Celsius. Here, throughout the year westerly wind flows this is quite strong. So, one can see that the summer months of the year is the best time to visit these islands, provided one gets the necessary permissions from the authorities. Another important thing that you must keep in mind is to carry proper dresses for yourself. You will surely require heavy clothes even if you travel in summers.