A group of global warming sceptics is considering an appeal, after losing its High Court bid to challenge temperatures recorded by the National Institute of Water and Atmospheric Research.
The New Zealand Climate Science Education Trust did not agree with three publications indicating the country's temperatures rose by almost a degree in the 100 years to 2009.
It applied for a judicial review of NIWA's decision to publish the data, saying it did not apply recognised scientific opinion.
In a decision released on Friday, Justice Venning threw out the case and ordered the Trust to pay NIWA's legal costs.
A former principal scientist at NIWA, James Renwick, said the ruling reaffirmed the credibility of its scientific process.
'Fundamentals may be heading in wrong direction'
A spokesperson for the Trust, Barry Brill, says the court ruling allows NIWA to pick and choose scientific methods, however appropriate.
He says many Government policies will be based on information from the Crown Research Institute.
"This is why it's very important that these records are correct, or the fundamentals which all of this policy is based on, may be heading in the wrong direction."