After recording well above average rainfall during summer, autumn is also kicking off on a very damp note in Brisbane. Brisbane city has had its fourth wettest summer since 2000, recording more than twice the usual rainfall and parts of the city have already recorded more than half of their normal March rainfall. A low pressure trough fed by moist onshore winds caused showers to increase to rain during Saturday morning, with the city picking up 18mm to 9am. Elsewhere, there were widespread falls for 15-20mm, with the bay-side suburbs of Wynnum and Lytton picking up more than 30mm each. Heavier rain set in during Saturday morning and by midday a further 15-30mm had fallen on most suburbs, with the city picking up 29mm and more than 40mm at the airport. The airport has now seen more than half of its normal March total. Around 40mm had also fallen at Gold Creek, near Brookfield, as well as at Geebung and Corinda, while Redcliffe had more than 50mm. At Archerfield Airport, 34mm since 9am marked their heaviest daily total for March in three years. The cloud and rain also led to a very cool day. In the city it reached 23.9 degrees just after 9am before dropping by a couple of degrees and sitting closer to 22 degrees for the rest of the morning. If it stays below 23.9 degrees, which is a good chance of happening, it will be the coolest day since spring. Rain periods should persist throughout Saturday afternoon, with the potential for a further 20-30mm or more in some places. The rain should then ease to showers during the evening as the trough weakens and a high pressure ridge builds from the south. Showers should amount to about 5-10mm on Sunday, mostly falling during the morning. Throughout the following week, the ridge will maintain onshore winds leading to a chance of showers every day.