| Climate of the Amazonian basin:
The climate of the basin of the Amazon is warm and wet except in the high Andes the average temperature is from 23° C to 28° C. It has weak seasonal variations, but the daytime oscillations are stronger. The annual rainfall oscillates between 2 and 3 m. By and large, the regimen of the rain suffers a dry station for quite a long time and it is accompanied in the plateaus of the Guayanas and in the surroundings of the Brazil the central temperatures are fresher. The screen formed by the massive of the Guayanas generates a wind of the type foehn that contributes to the plains' presence in the region of the river Branco. During the southern summer, the winds of the northern hemisphere penetrate the southwest of the Amazonía as a warm and wet monsoon. Cold blasts of southern origin.
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