 Climatically , the area receives about 900 millimetres ( 35 in ) of rainfall per annum with most of this falling between May and September . There is widespread variability of rainfall across the catchment however , from between 700 and 1 @,@ 300 millimetres ( 28 and 51 in ) . 
 Climatically , the area <a href='uninflect' title='1'><mark>receives</mark></a> about 900 millimetres ( 35 in ) of rainfall per annum with most of this falling between May and September . <a href='dey_it' title='2'><mark>There</mark></a> is widespread variability of rainfall across the catchment however , from between 700 and 1 @,@ 300 millimetres ( 28 and 51 in ) . 
Climatically , the area receive bou 900 millimetres ( 35 in ) of rainfall per annum w most of dis falling between May and September . It is widespread variability of rainfall across the catchment however , from between 700 and 1 @,@ 300 millimetres ( 28 and 51 in ) .