Pack or skip
Insect repellent for Singapore in September
Verdict
Pack it
Warm (89°F) plus 15 rainy days = mosquito conditions.
Why
Singapore in September averages highs of 89°F, lows of 77°F, 15 rainy days.
That climate means insect repellent earns its space in the bag. Warm (89°F) plus 15 rainy days = mosquito conditions.