Newest nature related face:
For fun, tap the main frond to see it bounce around.
Really like this one! Was just thinking it could be could to see a slight rain too. Not sure if that is doable though.
To build on what @Orion mentioned; you could add the current weather to the watch by having rain on the leaves, snow on the leaves, misty, etc. It could be very faint to not take away from the atmosphere you created.
Just an idea...