Exemplary Weather and Energy (EWE) Index March 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 (%)

The solar PV simulation output results were 9.3% higher than the long-term average. The cooling peak load was higher than the long-term average for 3-storey office buildings, 10-storey office buildings and supermarket, by 13.0%, 14.7 and 14.5%, 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.

Adelaide experienced a warmer March with similar humidity compared to the long-term average. The GHI was higher, but the wind speed was lower than the long-term average.

Weather Index



BRISBANE

Energy Index (%)

The solar PV simulation output was significantly lower than the long-term average by 32.9%. The cooling peak load was lower than the long-term average for all archetypes (11.2%, 12.4% and 2.6% for 3-storey office, 10-storey office and supermarket 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 more humid March with similar temperature compared to the long-term average. The GHI was significantly higher than the long-term average. The wind speed was lower in between 10am to 7pm and higher than the long-term average for the rest of the day.

Weather Index



CANBERRA

Energy Index (%)

The solar PV simulation output results were 2.0% lower than the long-term average. The cooling peak load was higher than the long-term average for supermarket and 10-storey office building, by 12.9% and 50.9% respectively, and lower for 3-storey office building, at 16.0%. 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 warmer and more humid March. The GHI was slightly lower in morning but slightly higher in the afternoon. The wind speed was significantly higher than the long-term average.

Weather Index



DARWIN

Energy Index (%)

The solar PV simulation output results were 18.5% lower than the long-term average. The cooling peak load was higher than the long-term average for 3-storey office buildings, 10-storey office buildings and supermarket, by 6.0%, 5.4% and 3.3%, 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 slightly warmer and more humid March compared to the long-term average. The GHI and the wind speed was lower than the long-term average.

Weather Index



HOBART

Energy Index (%)

The solar PV simulation output results were 1.1% higher than the long-term average. The cooling peak load was lower than the long-term average for 3-storey and 10-storey office buildings, by 15.6% and 16.0%, respectively, and significantly higher for supermarket, at 82.9%. 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.

Hobart experienced a warmer and slightly less humid March. The GHI was slightly higher at lunch time. The wind speed was higher than the long-term average.

Weather Index



MELBOURNE

Energy Index (%)

The solar PV simulation output results were 4.9% higher than the long-term average. The cooling peak load was higher than the long-term average for 3-storey and 10-storey office buildings, by 24.3% and 27.0%, respectively, and slightly lower for supermarket, at 3.6%. 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 is warmer during the daytime in March, but cooler for the rest of the day compared to the long-term average. Contrary to the drybulb temperature, the humidity was lower during the daytime but higher for the rest of the day. The GHI was slightly higher than the long-term average in the afternoon.

Weather Index



PERTH

Energy Index (%)

The solar PV simulation output results were 7.3% higher than the long-term average. The cooling peak load was lower than the long-term average for 3-storey and 10-storey office buildings, by 9.3% and 10.2%, respectively, and higher for supermarket, at 6.4%. 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 similar humidity and slightly higher temperatures in March compared to the long-term average. The GHI was higher and averagely the wind speed was similar to the long-term average.

Weather Index



SYDNEY

Energy Index (%)

The solar PV simulation output results were 8.1% lower than the long-term average. The cooling peak load was lower than the long-term average for 3-storey and 10-storey office buildings, by 11.3% and 8.0%, respectively, and higher for supermarket, at 3.7%. 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 a more humid March with very similar temperature compared to the long-term average. The GHI was lower before 1pm and then became higher after that time. The wind speed was generally higher than the long-term average during the daytime.

Weather Index



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