Pack or skip
Insect repellent for San Diego in January
Verdict
Pack it
Warm (66°F) plus 6 rainy days = mosquito conditions.
Why
San Diego in January averages highs of 66°F, lows of 49°F, 6 rainy days.
That climate means insect repellent earns its space in the bag. Warm (66°F) plus 6 rainy days = mosquito conditions.