The Bureau of Meteorology gauges measured the 27.8mm figure as at 9am Wednesday morning, an increase of 6.4mm on the previous peak of 21.4mm, recorded on February 3.
Elsewhere in the region Goomboorian got a healthy 13mm while Kandanga had 6.4mm, Cooran had 6mm and Fishermans Pocket had 5mm.
At the other end of the scale the Imbil Alert station recorded just 0.4mm. Rainbow Beach, Tin Can Bay and the Cooloola Coast also recorded minimal totals.
The weather bureau says more rain between 2mm and 8mm is expected to fall in Gympie tomorrow, with thunderstorms possible in the morning and afternoon.