Pack or skip
Insect repellent for Sydney in December
Verdict
Pack it
Warm (77°F) plus 11 rainy days = mosquito conditions.
Why
Sydney in December averages highs of 77°F, lows of 63°F, 11 rainy days.
That climate means insect repellent earns its space in the bag. Warm (77°F) plus 11 rainy days = mosquito conditions.