Not likely your issue but I had something similar that exactly every day my Wi-Fi would act up and my computer disconnect. It also happened to be the same time a nearby church starts ringing it's bells and my room happened to be very close to it. It also didn't happen on days the church didn't use the bells.

Still don't know what exactly caused this and I don't live there anymore but because I was the only one in my family with these problems, and only my room was facing the church, I want to believe the bells rang at a frequency that messed with my old routers Wi-Fi.

If someone could tell me if this Is possible, I could finally get some closure on this.