I've had mine stay on from time to time because of the passenger door, but I've not noticed it being relative to the weather. After re-closing the door 2-3 times it goes out and stays our for days/weeks at a time. I'll have to make a note of the weather conditions next time. Thanks for the heads up.
Thanks for the response - Let me know if you determine a weather pattern. Mine goes off after a few days also. I've assumed that whatever is getting wet is just drying out, and then the light goes off. I've slammed doors too often for their well being. In need of a permant fix. Thanks Again.