Pack or skip
Insect repellent for São Paulo in October
Verdict
Pack it
Warm (75°F) plus 10 rainy days = mosquito conditions.
Why
São Paulo in October averages highs of 75°F, lows of 59°F, 10 rainy days.
That climate means insect repellent earns its space in the bag. Warm (75°F) plus 10 rainy days = mosquito conditions.