The weather bureau says the heavy rainfall overnight in the tropical north region will continue.
Falls of up to 40 millimetres were recorded in the coalfields and Central Highlands, with Eungella getting 48mm.
John McIlwham from the bureau's Mt Bassett observatory says conditions in Mackay will only slightly improve by the end of the week.
"You're going to get rain periods, drizzle, maybe an odd little shower today carrying over into tomorrow but decreasing," he said.
"Yes you've got a chance of getting some nice falls out of that, maybe 25mm today and 15 again tomorrow."
Meanwhile, rain in parts of north Queensland is slowing the sugar harvest and may also delay the planting of new disease resistant cane varieties.
Rain is continuing to fall across the region, including cane growing areas around Ingham and the Burdekin.
Canegrowers' Herbert River manager Peter Sheedy says the forecast is not good.
"It's slowing the speed of the daily throughput," he said.
"We would hope that it's minimal but it remains to be seen.
"I think the indications are that we could be getting a bit more rain today and that will make things a little more difficult for the harvest.
"This is a time of year when there is a fair bit of planting to be done - we're trying to change our remaining varieties that have been susceptible to smut disease with more resistant varieties and that activity is well underway but it has to slow down and shut off while we're getting these light showers."
© ABC 2012
17:25 EST With lots of talk about the cracker start to the grain growing season, there are plenty of farmers who've missed out on that precious rain.