I live in southwest BC and drive in the pacific northwest of the US. Rain is a fact of life here, where some years off-leaf aerial imagery can't be flown because it's cloudy the entire off-leaf season.
If I don't upload pictures taken in the rain, there will be many roads without any pictures. It can take 2-6 trips between Vancouver and Seattle to luck out and get a section of road without rain in some parts of the year. This won't affect me since I use my photos from a local drive instead of Mapillary, but it will result in coverage gaps.
A typical photo from light rain is
Heavy rain from driving on the highway at speed is more like
. The overall greyness and reduced visibility isn't from rain on the camera, it's from rain in the air. Post-processing can improve this.
My camera is a roof-mounted Garmin Virb XE. Mounting inside the car doesn't help much. The windscreen still has the rain, just as bad, and the increased distance from the lens to the drops makes them more visible. On top of that, about 20% of shots have a wiper blade in them and with how I process my images, those would get uploaded too.
So, am I better off uploading sequences with rainy images or not?