Compared to the rest of Australia, Sandstone Island experiences exceptionally high wind speed, humidity levels and numbers of cloudy days. Overnight temperatures and rainfall are above average. Daytime temperatures and numbers of clear days are below average.
Sandstone Island has a wet and a dry season. The wet season in Sandstone Island begins around April and ends around October. Over the course of the wet season, Sandstone Island receives around 876.3mm of rain. By comparison, in the dry season from November to March, less than 160.8mm of rain falls in total. At the height of the wet season in July it rains on average 25 days in that one month. Indeed, Sandstone Island has experienced as much as 174mm in a single August day and as much as 368.4mm in a single month (June).
Temperatures in the wet season average between 16.3 and 21.2OC during the day and 11.1 and 15.4OC overnight. Temperatures in the dry season average between 20.1 and 23.3OC during the day and 14.2 and 17.2OC at night.