Why do flys bite before a rain?

Question

Why do flys bite before a rain?

Answer 1

flys dont bite...are you on drugs?

Answer 2

Flies bite more before a rain.

This rule does not always apply, but insects do calling more during moist weather, as flying is more difficult. Heat causes human sweating, which makes you a more appetizing target. Theses two reasons, plus a release of more body odors when atmospheric pressure on your body lowers, will add up to the rule that flies and insects are more bothersome just before a rain than at any other time.