Exemplary Weather and Energy (EWE) Index July 2025

The Exemplary Real Time Year weather files (RTYs), current Reference Meteorological Year files (RMYs) and Ersatz Future Meteorological Years (EFMYs) used for these monthly simulations are available for purchase. This will allow clients to simulate their own designs for energy budgeting and monitoring rather than rely on analogy with the performance of these archetypical buildings and systems. Especially in mild months, small differences in energy consumptions can result in large percentage differences. Solar irradiation data courtesy of Solcast.

Archetypical buildings and systems

10-storey office

3-storey office

Supermarket

5 kW domestic
PV system

Get the Best out of our Interactive Features

This monthly report has been interactive since April 2023.  Once you have scrolled to your city of interest, check out those interactive features and how they work.  Click here to read about the introduction.

  • 1. Choose the energy or peak demand graph to best match your building or system of interest.
  • 2. Choose the weather element graph to best match the sensitivity of your building or system of interest.
  • 3. Mix and match to learn about their relative importance or sensitivity

ADELAIDE

Energy Index (%)

WordPress Data Table Plugin

The solar PV simulation output was 3.4% lower than the long-term average. The heating peak load was higher than the long-term average for 3-storey and 10-storey office buildings, by 10.6% and 15.3%, respectively, and lower for the supermarket, at 16.9%. It should be noted that peak load results are highly sensitive to the particular building and HVAC design and settings – it is more appropriate to evaluate those results from a bespoke building model using our RTY data.

Adelaide experienced fewer humid nights in July with temperature similar to the long-term average. The GHI was very close to the long-term average and the wind speed was higher in the early morning and at night.

Weather Index

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WordPress Data Table Plugin
WordPress Data Table Plugin


BRISBANE

Energy Index (%)

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The solar PV simulation output was 0.5% lower than the long-term average. The cooling peak load was higher than the long-term average for the 3-storey office building, 10-storey office building, and supermarket, by 4.6%, 5.0%, and 8.6%, respectively. It should be noted that peak load results are highly sensitive to the particular building and HVAC design and settings – it is more appropriate to evaluate those results from a bespoke building model using our RTY data.

Brisbane experienced a warmer and more humid July than the long-term average. The GHI and wind speed were very close to the average.

Weather Index

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WordPress Data Table Plugin
WordPress Data Table Plugin


CANBERRA

Energy Index (%)

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The solar PV simulation output was 5.7% lower than the long-term average. The heating peak load was lower than the long-term average for the 3-storey office building, 10-storey office building, and supermarket, by 13.4%,12.8%, and 0.1%, respectively. It should be noted that peak load results are highly sensitive to the particular building and HVAC design and settings – it is more appropriate to evaluate those results from a bespoke building model using our RTY data.

Canberra experienced a colder and more humid July than the long-term average. The GHI was similar to the long-term average, while the wind speed was much higher than the average.

Weather Index

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WordPress Data Table Plugin
WordPress Data Table Plugin


DARWIN

Energy Index (%)

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The solar PV simulation output was 9.5% lower than the long-term average. The cooling peak load was lower than the long-term average for the 3-storey office building, 10-storey office building, and supermarket, by 3.9%,5.4%, and 1.3%, respectively. It should be noted that peak load results are highly sensitive to the particular building and HVAC design and settings – it is more appropriate to evaluate those results from a bespoke building model using our RTY data.

Darwin experienced a warmer and more humid July compared to the long-term average. Both GHI and wind speed were much lower than the average.

Weather Index

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WordPress Data Table Plugin
WordPress Data Table Plugin


HOBART

Energy Index (%)

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The solar PV simulation output was 7.0% higher than the long-term average. The heating peak load was higher than the long-term average for the 3-storey office and 10-storey office, by 7.3% and 5.9%, respectively, while it was 4.7% lower for the supermarket building. It should be noted that peak load results are highly sensitive to the particular building and HVAC design and settings – it is more appropriate to evaluate those results from a bespoke building model using our RTY data.

Hobart experienced a warmer and more humid July compared to the long-term average. The GHI and wind speed were higher than the average during the daytime.

Weather Index

WordPress Data Table Plugin
WordPress Data Table Plugin
WordPress Data Table Plugin


MELBOURNE

Energy Index (%)

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The solar PV simulation output was 5.3% lower than the long-term average. The heating peak load was higher than the long-term average for the 3-storey office and 10-storey office, by 53.2% and 49.3%, respectively, while it was 7.7% lower for the supermarket building. It should be noted that peak load results are highly sensitive to the particular building and HVAC design and settings – it is more appropriate to evaluate those results from a bespoke building model using our RTY data.

Melbourne experienced comparable temperatures and slightly higher humidity in July compared to the long-term average. The GHI was slightly lower than the average in the afternoon.

Weather Index

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WordPress Data Table Plugin
WordPress Data Table Plugin


PERTH

Energy Index (%)

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The solar PV simulation output was 7.0% higher than the long-term average. The cooling peak load was higher than the long-term average for the 3-storey office building, 10-storey office building and supermarket, by 18.9%, 49.9%, and 61.1%, respectively. It should be noted that peak load results are highly sensitive to the particular building and HVAC design and settings – it is more appropriate to evaluate those results from a bespoke building model using our RTY data.

Perth experienced comparable temperatures and higher humidity in July compared to the long-term average. Both GHI and wind speed were similar to the average.

Weather Index

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WordPress Data Table Plugin
WordPress Data Table Plugin


SYDNEY

Energy Index (%)

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The solar PV simulation output was 1.4% lower than the long-term average. The cooling peak load was lower than the long-term average for the 3-storey office building, 10-storey office building and supermarket, by 20.7%, 27.1%, and 14.1%, respectively. It should be noted that peak load results are highly sensitive to the particular building and HVAC design and settings – it is more appropriate to evaluate those results from a bespoke building model using our RTY data.

Sydney experienced humidity and temperature in July similar to the long-term average. The GHI was comparable and the wind speed was slightly above the average.

Weather Index

WordPress Data Table Plugin
WordPress Data Table Plugin
WordPress Data Table Plugin

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