@Dave7, for the avoidance of doubt.
Sleet
Is a mixture of rain and snow and is a winter precipitation.
During wintry weather, snowflakes can go through a warmer layer and begin to melt as they fall towards the ground.
Snow
Snow is formed when temperatures are low and there is moisture in the atmosphere in the form of tiny ice crystals.
Precipitation falls as snow when the air temperature is below 2 °CC
Hail
Hail occurs during severe weather such as thunderstorms when dust or particles in the air collide with cold water.
An ice pellet is formed as the water freezes around the object. When the pellet becomes heavy enough it falls to the ground.
Mist
Is defined as 'when there is such obscurity and the associated visibility is equal to or exceeds 1000 m.' Like fog, mist is the result of the suspension of water droplets, but simply at a lower density.
Fog
By international agreement fog is the name given to resulting visibility less than 1 km. However, in forecasts for the public, this generally refers to visibility less than 180 m.
Defined as 'obscurity in the surface layers of the atmosphere, which is caused by a suspension of water droplets'.
Haze
Is a slightly different phenomenon which is a suspension of extremely small, dry particles in the air, not water droplets. These particles are invisible to the naked eye, but sufficient to give the air an opalescent appearance.