Pack or skip
Insect repellent for Houston in September
Verdict
Pack it
Warm (90°F) plus 9 rainy days = mosquito conditions.
Why
Houston in September averages highs of 90°F, lows of 70°F, 9 rainy days.
That climate means insect repellent earns its space in the bag. Warm (90°F) plus 9 rainy days = mosquito conditions.