Biloela Cotton Growers Association president Tim Sullivan said while there had been some isolated falls of more than 25 millimetres, most Central Queensland districts received less than 10mm.

Mr Sullivan said there hadn't been a decent fall of rain on his cotton crop at Biloela since the middle of December, and he was "struggling to keep up with the irrigation".

"We have been continually irrigating since the first week in December," he said.

"We were fortunate enough to get good rain at planting time in October.

"We had cold-shock days in November - which is very unusual for this area - which delayed the crop and some of our plant populations aren't optimum.

"And last week it was up to 44.5 degrees C. Days like that really knocked the cotton around and we struggled to keep the water up to it."

Mr Sullivan is growing 200 hectares of irrigated single skip cotton and 30ha of super single dryland cotton on his farm, Navillus, this season.

"We planted the area to cotton this year in anticipation of it being a wet year, but it hasn't turned out that way," he said.

"The way the weather has turned out, we have overplanted the area of cotton.