The climate of London is oceanic type of Breton, being in the classification of Köppen climate a cfb; that is to say, a temperate climate with abundant rainfall throughout the year. We are going to see what are the geographical factors that determine its climate, which make the time is changing so much despite the fact that their thermal variability throughout the year so little.
Influence of the geographical situation in the climate
London is located in the 51o North, in Western Europe, in an area of the planet whose main characteristic is the thermal moderation, as a result of its latitudinal situation and of the influence of the sea. Let's see how this affects the weather in London.
1.With regard to the latitudinal situation, the area is the convergence point for two centers of action associated with two air masses very different, the warm tropical air and the cold polar air (this impact zone is known as polar front). These masses are:
The Azores anticyclone, a mass of wet air (born in the ocean) and warm (is of tropical origin).
The depression of Iceland, we are talking about air also wet (also born in the ocean) and cold (polar).
The clash of two humid air masses with different thermal characteristics associated precipitation.
2. With respect to the marine influence; the English coasts, are bathed by a branch of the Gulf Stream, a warm current known as the North Atlantic Drift, which makes the temperatures are 11or higher than in the same latitudes in America, in addition to facilitating the formation of clouds filled with moisture.
3. In regard to the influence of the relief in the climate of London it should be noted the absence of mountain barriers, and therefore, the penetration of the influence of humid winds.
The stations in London
All the geographical factors identified are combined to make the time in England is in all the stations very unstable and moderate heat with very little interannual variability.
In January, the average values of the temperature in London are of 4° C. The aforementioned maritime influence, which moderates the temperatures, along with the low average altitude of the south of England, makes this temperature is less low that in many areas of inland Spain in the same period. In addition, the variations in temperature in winter are only of 5 or 10 °.
In July, the average temperature is 18 º; but to be in such an unstable area is very common both the arrival of cold fronts both as cyclone, with which the temperature can be very variable and of days quite cold go to days with 30O.