I'm sure I've mentioned this one before but in Newfoundland we get weather forecasts of "RDF" = Rain, Drizzle, and Fog. And it is precisely that. I've started to differentiate between raining and non-raining fogs but I have no nice words for them.
In late July, it can be warm and foggy and drizzly all at the same time, and the Newfoundland word for this is mauzy. It is also called capelin weather because during weather like that, the capelin "come in", and it's a great time to see whales (who come to eat capelin). You don't even need a boat, they're right below you as you stand on the cliffs.
Then on the sea during the winter you can have slob ice which is a slushy mixture of ice and water.
My husband and I differentiate between cold and warm snow. The cold snow, which we rarely get in Newfoundland (but is the standard in Winnipeg) crunches under your feet. The warms snow just goes "schlup".
