The weather forecast for Slovenia is not quite something which would be worth driving a long way down here - to do skiing, I mean.
Over this night and tomorrow it will be clear, and time to time more cloudy. Tomorrow in the afternoon in mountains short periods of rain can occur. Lowest morning temperatures 8 to 14, highest daily 22 to 27 degrees C (for Slovenia, not for mountains, of course).
In Sunday in the morning it will still be mostly sunny and warm, in the afternoon from the North rain and storms will start coming. Only on the coast region it will stay dry.
So, ja, early in the morning...