It doesn't always do it, but when it does it, the airbag light flashes a 4-2 code (left-hand collision sensor from what I could gather)
I suspect a bad connection/wiring, since when it's warmer outside and not as humid, it won't do it.
I assume the sensor itself might be located near the bumper, but couldn't find anything in my Haynes manual.
If I'm not able to fix it, I don't really care for airbags, but I don't want an inspection to find out how much it's gonna cost to get it fixed, so I want to have it stop blinking (short of pulling the light out