Thanks chuck.
Just about got my head around the next section.
The heat concentrated heat at the equator means hot air rises and sinks at the 30 degree mark, this is called the Hadley Cell.
The Polar Cell carries the (relatively) warm and moist air from the 60 degree region to the poles where is sinks as it cools.
The final mixing zone between 30 and 60 degrees is more complicated. The Ferrel Cell relies on the air movements on the two other cells rather than solar radiation and as a result the weather here is much more unstable (as anyone British should be familiar with!).
This means the worlds air pressure maps looks as follows:
This air pressure is very important to the map because it will influence the wind directions on the map and the rainfall.
Winds travels from high pressure areas to low pressure areas. Coriolis Force means winds in the northern hemisphere bend to the right and to the left in the southern hemisphere. This means the predominant air flows of the world are:
Even more important are the effects of pressure on rainfall. In very general (and simplified terms) low pressure areas have higher rainfall because the air is cooling and sinking. In high pressure areas the air is rising and generally rainfall is lower. The exception to the rule is the Equator where the air converges from the north and south and is characterized by heavy rainfall.
Looking at a World Climate Map you can see the 30 degree latitudes contain the worlds major deserts.
So for my world the following maps shows the wet and arid areas:
All of the information so far hasn't been affected by any of my map features. The next stage is to add the effect of mountain ranges on atmospheric circulation and therefore rainfall and try to add simple ocean currents that will add a bit of randomness to the (eventual) climate type.