Queensland has recorded its hottest year since records began more than 100 years ago.

It has been so warm over the past 12 months that the Bureau of Meteorology added pink and purple to its maps.

Senior forecaster Jonte Hall says last month was especially hot.

"The state as a whole has been over four degrees above average for the whole month of September," he said.

"That beats the previous record by almost two degrees.

"Around about 35 locations broke their mean, monthly maximum temperature record," he said.

Temperatures reached as high as 39 degrees in Charleville and 40.6 degrees in Isisford.

Mr Hall says much of Queensland is drought-declared following an extended period of dry weather over the west of the state.

The weather bureau expects above average temperatures to continue into summer.

Records have been kept since 1910.