In our house, coax cable comes from the utility in a rear alley, then is joined to a separate cable that enters the house on the second floor. Here's a photo:
The black cable on the left comes from the utility; the beige cable on the right enters the house.
This is in a place with a fairly harsh climate: -20℃ in winter to +30℃ in summer is perfectly normal, annual snowfall and rainfall are both plentiful, and we get lots of sunshine, high humidity, low humidity, freezing rain, and thunderstorms. Hurricanes and volcanoes are not a concern.
Is this standard practice for coax cable? More importantly, is it weatherproof?
If not: is it my responsibility to fix, or the cable company's? (I'm in Montreal, Canada, and the cable company is Vidéotron.) The cable from the utility is new, having been replaced in Aug 2017 after a storm. The cable entering the house is not new, but it doesn't appear to be in terrible condition.