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Unprecedented September heat will affect southern Queensland and northern NSW on Wednesday and Thursday, causing some locations to break records for the second time in a week.

Weatherzone says a pool of unseasonably hot air is set to sweep across central and eastern Australia later this week ahead of an approaching low pressure trough.

Some of the locations are forecast to reach near or above their September records on Wednesday or Thursday:

• Birdsville is forecast to reach 43C on Wednesday – current September record is 42.4C from 2003
  Thargomindah is forecast to reach 42C on Wednesday – current September record is 40.4C from last Saturday (23rd September 2017)
  Bourke is forecast to reach 42C on Wednesday – current September record is 40C from last Saturday (23rd September 2017)
  Dubbo is forecast to reach 36C on Wednesday – current September record is 35.5C from last Saturday (23rd September 2017)
  Narrabri is forecast to reach 37C on Wednesday – current September record is 36.6C from 2000
  Charleville is forecast to reach 41C on Wednesday – current September record is 39C from 2013
  Amberley is forecast to reach 40C on Thursday – current September record is 39.2C from 1943
  Brisbane is forecast to reach 37C on Thursday – current September record is 38.3C from 1943

State records are also expected to fall amid this week’s pulse of heat and the national record for September could be challenged.

The highest temperature ever recorded in Queensland during September was 42.4 degrees at Birdsville Police Station in 2003.

The highest temperature ever recorded in New South Wales during September was 40.5 degrees at Wilcannia last Saturday (23rd September 2017).

The highest temperature ever recorded in Australia during September was 43.1 degrees at West Roebuck, WA in 2003.

Source: Weatherzone