A small amount of rain or snow.
Squitter is a funny word for a little bit of rain or snow.
Examples:
I felt a squitter of rain on my face.
The squitter of snow didn't last long.
The squitter made the ground wet.
I don't mind a squitter of rain, but I don't like a lot.
The squitter of snow was like a tiny storm!
The squitter was so small, it was like a little kiss from the sky.