Pack or skip
Insect repellent for Zurich in September
Verdict
Pack it
Warm (67°F) plus 9 rainy days = mosquito conditions.
Why
Zurich in September averages highs of 67°F, lows of 50°F, 9 rainy days.
That climate means insect repellent earns its space in the bag. Warm (67°F) plus 9 rainy days = mosquito conditions.