yup .. good little maps here on El Nino rainfall .. the rainfall section ..
Precipitation
Blue circles indicate that during El Niño there was, on average, more rain than normal, red circles indicate drought during El Niño. La Niña has the opposite effect in almost all locations. The size of the circles is a measure of the strength of the relationship.
March-May In boreal spring the strongest effects are in the western Pacific Ocean: along the equator rainfall increases during El Niñ and at 10°-15° North and South rainfall decreases. The north of Mexico and the desert states of the U.S. usually get more rain. The North-East of Brasil often stays drier than usual during El Niño. Even in our part of Europe it rains more on average during El Niño.
June-August In these months eastern Indonesia often suffers droughts during El Niño. The rain zone has moved east to the islands along the equator in the Pacific Ocean. The Indian Monsoon is often weaker during El Niño, although by no means always.
September-November This season the effects of El Niño are strongest. Almost all of Indonesia, the Philippines and eastern Australia are drier than usual during most El Niño events. Large parts of India are often drier than usual, but the Sri Lanka and some southern states get more rain. East Africa, parts of Central Asia and Spain are also on average wetter than normal during El Niño in this season, as are Chili and Uruguay.
December-February In boreal winter the Philippines and East Indonesia stay drier, whereas the Pacific islands along the equator remain wetter. Florida also gets more rain than normal during El Niño, this effect extends to other southern states of the U.S. and into Mexico. South Africa is more frequently dry, as is the northern coast of South America and some of the leeward Antilles. In Uruguay en South Brasil rainfall increases on average. Along the coasts of Ecuador and Peru rainfall increases when the coastal waters heat up, an effect also named El Niño but not always coincident with the warming along the equator that affects the rest of the world.
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