I am getting major static on my telephone line. I noticed a pattern.
It happens right after a rainstorm. Then in a few days it resumes
normal functioning.

I called the telephone company and they informed me that if they find
it is on their end they will fix it for free. But they also warned
that if it is on my end, that they will charge outrageous rates.

I did the test of plugging a phone into the outside box. The static
wasn't there. I plugged it inside my house and the static was there.
That leads me to believe that the problem is with my lines.

So, before I spend the outrageous money to call the telephone compamy
out, can anyone tell me if there is something else I can try. And,
what will they do (besides charge a lot) once they come out to fix it?
Replace all my internal wiring?