When it comes to low back pain your glutes are definately to blame. I haven't had one patient who's had lower back without weak glutes, either on one side of both. Your glutes are the largest muscle in the body and yet for many people they are the weakest. That doesn't mean you go running to the leg machines and begin churning out set after set.
As stated in my previous blog posts if you have weak glutes hammering your legs on the leg machine won't make a dame bit of difference, you need to go back perform the rehab exercises to get your glutes firing again. Your glutes play an huge role in stability through the hips and spine. When there is no stability present the low back will pick up the pieces with aches and pains.
Stop blaming the external factors such as the weather or your lower back your glutes are behind most of the issues.