<P> Sometimes As is used in place of Aw if the dry season occurs during the time of higher sun and longer days often due to a rain shadow effect that cuts off summer precipitation in a tropical area . This is the case in parts of Hawaii, East Africa (Mombasa, Kenya, Somalia), Sri Lanka (Trincomalee) and coastal regions of Northeastern Brazil (from Fortaleza through Natal to Maceió), for instance . The difference between' summer' and' winter' in such locations is usually so slight that a distinction between an As and Aw climate is a quibble . In most places that have tropical wet and dry climates, however, the dry season occurs during the time of lower sun and shorter days because of reduction of or lack of convection, which in turn is due to the meridional shifts of the Intertropical Convergence Zone during the course of the year . </P> <Table> <Tr> <Th> Accra </Th> </Tr> <Tr> <Th> Climate chart (explanation) </Th> </Tr> <Tr> <Td> <Table> <Tr> <Td> J </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> J </Td> <Td> J </Td> <Td> </Td> <Td> </Td> <Td> O </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 15 31 23 </Td> <Td> 33 31 24 </Td> <Td> 56 31 24 </Td> <Td> 81 31 24 </Td> <Td> 142 31 24 </Td> <Td> 178 29 23 </Td> <Td> 46 27 23 </Td> <Td> 15 27 22 </Td> <Td> 36 27 23 </Td> <Td> 64 29 23 </Td> <Td> 36 31 24 </Td> <Td> 23 31 24 </Td> </Tr> <Tr> <Td_colspan="12"> Average max. and min . temperatures in ° C </Td> </Tr> <Tr> <Td_colspan="12"> Precipitation totals in mm </Td> </Tr> <Tr> <Td_colspan="12"> Source: BBC Weather </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td> <Table> <Tr> <Th_colspan="12"> (show) Imperial conversion </Th> </Tr> <Tr> <Td> J </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> J </Td> <Td> J </Td> <Td> </Td> <Td> </Td> <Td> O </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 0.6 87 73 </Td> <Td> 1.3 88 75 </Td> <Td> 88 76 </Td> <Td> 3.2 88 76 </Td> <Td> 5.6 87 75 </Td> <Td> 7 84 74 </Td> <Td> 1.8 81 74 </Td> <Td> 0.6 80 71 </Td> <Td> 1.4 81 73 </Td> <Td> 2.5 85 74 </Td> <Td> 1.4 87 75 </Td> <Td> 0.9 88 75 </Td> </Tr> <Tr> <Td_colspan="12"> Average max. and min . temperatures in ° F </Td> </Tr> <Tr> <Td_colspan="12"> Precipitation totals in inches </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Th> Accra </Th> </Tr> <Tr> <Th> Climate chart (explanation) </Th> </Tr>

Which staple crop is most clearly associated with areas of tropical savanna climate in india