Colonists seem perfectly happy to use the telescope during periods of bad weather. Unless they have the 'creepy' trait (and of course, RW has better taste than that), there isn't anything to look at.
Using the telescope should only happen during clear weather and some of the time during cloudy weather.
It's not a big thing but should be an easy fix for you all.
Thanks
You know you can use the telescope to watch different things then the ship wrecks,moon and stars ?
Like the weather or into the room of your neightbour or just count how many snow flake's rush by your view. :-)
Don't forget watching the telescope is recreation not a job.
Thank you for the feature request!