No Internet Every Morning For Past Month - Had Tech Guy at House Other Day - Worked OK for 2 Days

Hope someone can advise....

Upgraded cable tv and switched to cable internet about a year ago.

A. TV - Audio Issue

TV was working well until a few months ago. We added a subscription channel earlier this year that shows European tv shows and movies. At first all was good. Then a few months ago, we started having occasional problems with video freezing or hesitating periodically. Then started having periodic times when audio would repeat sentences for a while during a show. Very unpleasant to watch show when it happens.

B. Internet

During the work week I get up very early, about 5:30 am and check email and/or go online.

About a month ago, when I got up early and tried to check email it did not work. Noticed lights on my Netgear modem were not blinking as usual. Restarted modem and still no internet.

A few hours later, internet worked again.

Since then, this became a daily occurence. 

Also use 'Google pucks' to extend WiFi to other parts of house. So, use the Google WiFi app to check network status on my cellphone. It would show message that internet went off at 4:30 am or similar time at night each day.

Network would come back up sometime between 6:30 - 8:30 am typicaly.

Had a Comcast tech come to house last Monday. He checked line from street to house, the box on front wall of house, splitter/amplifier in attic that connects to the box, connections throughout house, etc.

He put on new box on front of house, re-did some of the connections in the box, removed a splitter in family room, put new connectors on a few cables in the house, ran a new cable from outlet in master bedroom to tv, etc.

He did note that before doing the work there was some performance issue in network. Forget technical term, but it showed red number instead of green number on his testing equipment. After doing the fixes, it turned green.

Tuesday and Wednesday morning I got up early morning and internet was working.

Also, audio on the subscription tv channel was working well the past few days.

Today, this morning, Thursday, I got up early morning and there was no internet working.

Could this be weather related issue?  It was raining lightly yesterday and temp was about 45 degrees last night.

Although I think it odd that weather is issue since up until the past month, was not having these issues.

Only other item to mention is tech guy noted that I have 59G cable inside my house instead of the newer 6G type. I had my house wired for cable back in '93 when we remodeled house.

Any thoughts or suggestions about fixing this situation?

Thanks,

Mark