It sounds like the rain seeped into where it was completing the circuit. Is the switch inside, or outside? If outside, water may be inside the switch and turning the lights on.
Every day's a learning experience, though sometimes not what we expected.
2012 Jay Flight 19RD
2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
1 Spoiled Dog