NatHERS Climate Zones and Weather Files

Climate Zones

NatHERS divides Australia into regions of similar climatic conditions, referred to as climate zones. Homes in each separate climate zone are unlikely to require significant differences in house design to reach a similar star rating. The number of climate zones is defined by the availability of quality climate data, and whether locations are sufficiently unique to warrant separation from nearby zones.

Climate zones are generally aligned with postcode boundaries for convenience, except where there is likely to be a topographical or other feature within the postcode area that impacts the local climate. In this scenario, alternative zones are offered for the same postcode. For example, if a postcode includes a mountainous area, an alternative climate zone may be used above a certain altitude.

A new climate zone may be considered for inclusion in NatHERS if a suitably qualified expert can provide evidence to the National Administrator that:

  • a particular region varies sufficiently from the surrounding zones to warrant different building design strategies; and
  • adequate Bureau of Meteorology climate data exists for a city or town in the proposed new zone.

A colour display of Climate Zones is available in the NatHERS interactive Climate Zone Map. Click on the area of interest to get more information.

Suburban Australian street during the day

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2012 NatHERS Reference Meteorological Year Climate Files

NatHERS Reference Meteorological Year (RMY) climate files for 2012 have been compiled from Bureau of Meteorology (BOM) raw climate data and are used to simulate a typical year for every NatHERS climate zone in Australia.

These files are included in versions of NatHERS Accredited Software as determined by the NatHERS National Administrator to support software operation.

The files may be provided for research purposes by the NatHERS Administrator on request. The files may not be suitable for uses other than NatHERS residential building ratings and so users should make their own decision on their suitability for other uses.

NatHERS assessors cannot use these files for regulatory purposes.

For an overview of how NatHERS Star ratings are calculated.