Pack or skip
Insect repellent for Tbilisi in September
Verdict
Pack it
Warm (79°F) plus 8 rainy days = mosquito conditions.
Why
Tbilisi in September averages highs of 79°F, lows of 59°F, 8 rainy days.
That climate means insect repellent earns its space in the bag. Warm (79°F) plus 8 rainy days = mosquito conditions.