I think it lasts about 7 days. Is there a way to make it reboot automatically every hour at a certain time?
I wouldn‘t recommend it, better track down the problem. I have it running for months without a problem.
PS: And something out of the question, since you're so good, would it be possible to get a statistic of the nights?
so that we can know which nights were good during the year.
I‘m not so sure what you mean. Is this more than the recording done for the weather radio web page? Take a look at my own instance here: weather.openfuture.de/