Something else is going on with your bike IMO. I ride in the rain more than I want to and have left my XR sitting out for days in the rain when I go on week long trips with no problems. I would go over your plug wires for cracks or a bad boot then work your way around the rest of the electrical system.
2011 Cross Roads Sunset Red
OEM short windshield, passenger backrest, crash bars, saddle bag bars, heated grips, vinyl closeouts, tachometer, ambient temp, LED headlight, luggage rack. WD lay down licence plate.