The revelation comes as Albury-Wodonga prepares to swelter through its hottest November day on record.

The Bureau of Meteorology predicts the mercury could reach 42 degrees on Thursday - two degrees warmer than the current November record of 39.5 which was recorded in 1997 at Albury airport.

Last November, the NSW government announced more than 900 schools would have new air conditioning systems installed over five years as part of the first round of the $500 million Cooler Classrooms program.

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But in the first year of the program the systems were only installed in 48 schools, NSW Education Department data shows, with installation underway in about 35 schools.

At least half of the schools where instillation has been completed are in areas with a mean-January temperature below 30-degrees.

Member for Albury Justin Clancy said construction had begun at one school in the Albury electorate, Urana Public School, while plans had been developed and the tender process started at a further two schools, James Fallon High School and Tumbarumba High School.

He said construction takes on average 12 weeks onsite.

Design work is expected to begin on a further eight schools in the electorate by the end of 2019.

No timeline has been provided for the other 29 schools in the Albury district.

Mr Clancy said due diligence had been completed at all 40 schools in the Albury electorate. He said he appreciates the need for air conditioning in schools, particularly as the weather heats up.

"This is something that we are regularly monitoring," he said. "We are working closely with staff of the Department of Education to roll this program out as quickly as possible."

Last week shadow education minister Prue Car accused the government had "bizarrely prioritised schools in Sydney's coastal suburbs".

The Education Minister Elizabeth Mitchell's office did not respond to a request for comment by deadline.

In addition to cooling and heating the air conditioning systems are designed to supply fresh air to avoid stuffy classrooms,and notify teacher or student if the weather outside is 'optimal for opening windows'.