Pack or skip
Insect repellent for London in July
Verdict
Pack it
Warm (73°F) plus 8 rainy days = mosquito conditions.
Why
London in July averages highs of 73°F, lows of 57°F, 8 rainy days.
That climate means insect repellent earns its space in the bag. Warm (73°F) plus 8 rainy days = mosquito conditions.