Ongoing connectivity issues - recurring problem, no permanent fix

Hi all,
I’m hoping to see if others have experienced something similar and if anyone has found a permanent solution.

For the past few months, since winter started, I’ve been dealing with nonstop internet connectivity issues. Sometimes the service is down for an entire day, other times it drops out overnight or intermittently throughout the day. I’ve started to notice that the outages seem to trend toward colder temperatures, though I can’t say that’s the sole trigger.

Every time this happens, I go through the same cycle:

• Restart modem, basic troubleshooting, chatbot steps (done many times)

• Issue gets escalated

• A technician comes out

• A vague explanation is given, service appears “fixed”

• Things work for a short period

• Then the exact same problem returns

This has happened repeatedly, and I’m honestly at the point where sending a tech out feels pointless if the underlying issue isn’t being identified or permanently resolved.

I’m located in the Midwest, and I’m curious if others in colder regions have had similar recurring issues during winter months (signal degradation, line issues, temperature-related failures, etc.). At this point I’m less interested in temporary fixes and more in understanding what the root cause might be and how to actually address it long-term.

I pay a significant amount for reliable internet, and frequent outages, especially multi-hour or full-day ones, are becoming unacceptable.

If anyone has dealt with this before, or if an Xfinity rep can help point this toward a deeper investigation rather than another reset/tech loop, I’d really appreciate it.