* Elevation: Snow is more likely to be present on mountains that are high enough to reach the snow line, which is the altitude where temperatures are consistently low enough for snow to fall and accumulate.

* Latitude: Mountains closer to the poles or at higher latitudes are more likely to have snow, even at lower elevations, because they experience colder temperatures year-round.

* Climate: Mountains in dry climates or those located in desert regions might not have snow on top, even at high elevations, due to a lack of precipitation.

* Season: Even mountains that normally have snow can be snow-free during the summer months, depending on their location and the specific climate.

So, while many mountains are associated with snow, it's not a universal characteristic.