ScienceDaily (June 4, 2012) — The mosquito is possibly summer's biggest nuisance. Sprays, pesticides, citronella candles, bug zappers -- nothing seems to totally deter the blood-sucking insect. And neither can rain apparently. Even though a single raindrop can weigh 50 times more than a mosquito, the insect is still able to fly through a downpour.
http://www.sciencedaily.com/releases/2012/06/120604155558.htm