Hi! so, like you, I hadn't seen a meteor shower ever in my town. Now I know there are several factors involved in this:
1. There are two types of showers: light and heavy. Light showers drop abt 5 stars a minute in short and spaced periods of time, and heavy around 8 stars for extended and more frequent periods of time. Perhaps you've had lots of light showers but maybe they were scheduled for, say, 2 am, so ofc you wouldn't see them. Also, Isabelle doesn't announce these.
2. Isabelle does announce heavy showers, but guess what? if there is another announcement, like someone moving in or out, or a camper, she will not say anything abt the meteor shower. This is specially significant since in the first months the announcements seem endless! Apparently I had a shower in april i missed bc of this.
3. So, the best way to not miss them is finding your weather seed.
this thread has all the info you need to get yours.
4. celeste ONLY appears when there is a shower, be it light or heavy.
I too had never seen a meteor shower on my town and thought it was bc I hadn't had any, but turns out I only had one in april and missed it. Over all, your seed might be like mine with just very few showers during the year, so I advise you find your seed and keep close track of light showers so you actually collect star fragments