If you're looking for summer vibes, the best time to travel to Wollongong is in January, February and December, when the average temperature reaches 29.3 °C, while July, August and September are the 3 sunniest months of the year, with an average of 102.13 hours.
If you prefer colder temperatures, however, make sure you visit Wollongong during the months of July, June and August to experience an average of 7.74 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during May, July and September, when the average precipitation in Wollongong is 9.75 mm, while the months of January, February and March are drier, with an average of 0 mm.