The reading was 0.1 percentage point above a flash estimate of 4 percent released by the state-run Statistics Poland (GUS) agency at the end of last month.
In August, the prices of consumer goods and services in Poland were 3.4 percent higher than in the same month a year earlier, according to the state-run Statistics Poland (GUS) agency.
In July, Poland's consumer price index stood at 3 percent, Statistics Poland reported.
Next year, Polish inflation is expected to average 2.8 percent, under the country's budget approved by the government last month.
The Polish central bank predicted in its latest Inflation Report, released on July 10, that inflation would average 2.9 percent in 2026, followed by 2.7 percent in 2027 and 2.2 percent in 2028.
(gs)
Source: IAR, PAP