Exemplary Weather and Energy (EWE) Index June 2023

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 to 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. Solar irradiation data courtesy of Solcast.

Archetypical buildings and systems

3-storey office

10-storey office

Supermarket

5kW domestic PV system

ADELAIDE

BRISBANE

CANBERRA

DARWIN

HOBART

MELBOURNE

PERTH

SYDNEY

ADELAIDE

Adelaide experienced a less humid and warmer June compared to the long-term average. The GHI was lower, and the wind speeds were notably higher.

Weather Index



Mean Min	Mean Avg	Mean Max
+2.0	+1.3	+0.4


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
+1.6	-3.8	-4.6


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
-3.6	-8.3	+0.3

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
-31	+160	-27	+55	-13	+290
Solar PV
-15%

The solar PV simulation output results were 15% lower than the long-term average. All archetypes saw a notable increase in cooling peak loads, and a decrease in heating peak loads. The cooling peak loads were 87%, 214%, and 68% higher for the 3-storey office, 10-storey office, and supermarket, respectively. The heating peak loads were 41%, 48%, and 27% lower for the 3-storey office, 10-storey office, and supermarket, respectively.

BRISBANE

Brisbane experienced a less humid and warmer June compared to the long-term average. The GHI was greater, while the wind speeds were comparable.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-0.3	+0.3	+0.7


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
-7.4	-7.1	-7.0


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
+46	+8.7	+2.1

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
-37	+9.3	-37	+7.9	-10	+2.4
Solar PV
+8.3%

The solar PV simulation output results were 8.3% lower than the long-term average. All archetypes saw a decrease in cooling and heating peak loads. The cooling peak loads were 23%, 25%, and 32% lower for the 3-storey office, 10-storey office, and supermarket, respectively. The heating peak loads were 47% lower for the 3-storey and 10-storey offices, and 23% lower for the supermarket.

CANBERRA

Canberra experienced a more humid and warmer June compared to the long-term average. The GHI was comparable, while the wind speeds were significantly higher.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
+1.3	+0.3	-0.3


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
+4.2	+1.7	+1.4


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
-25	-1.2	+0.6

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
+5.0	-42	+0.0	+3.2	-11	N.A.
Solar PV
+2.3%

The solar PV simulation output results were 2.3% higher than the long-term average. The 3-storey office, 10-storey office, and supermarket each saw a decrease in cooling peak loads, of 11%, 84%, and 16%, respectively. The heating peak load increased most notably by 27% for the 10-storey office.

DARWIN

Darwin experienced a more humid and warmer June compared to the long-term average. The GHI and the wind speeds were lower.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
+1.3	+1.1	+1.1


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
+8.0	+7.3	+7.5


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
-6.4	-5.7	-4.9

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
N.A.	+24	N.A.	+22	N.A.	+16
Solar PV
-8.1%

The solar PV simulation output results were 8.1% lower than the long-term average. The 3-storey office, 10-storey office, and supermarket each saw a decrease in cooling peak loads, of 19%, 21%, and 1.3%, respectively.

HOBART

Hobart experienced a slightly less humid and warmer June compared to the long-term average. The GHI was signficantly higher, and the wind speeds also tended to be higher.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
+1.2	+1.3	+1.6


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
-1.7	-2.4	-1.3


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
+11	+20	+6.1

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
-41	N.A.	-40	N.A.	-21	N.A.
Solar PV
+13%

The solar PV simulation output results were 13% higher than the long-term average. The 3-storey office and 10-storey office saw a notable increase in cooling peak loads of 106% and 113%, respectively. The heating peak loads were 25% lower for the 3-storey and 10-storey offices, and 19% lower for the supermarket.

MELBOURNE

Melbourne experienced a similarly humid and warmer June compared to the long-term average. The GHI and the wind speeds were higher.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
+0.9	+0.7	+0.7


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
+0.1	+0.7	-0.6


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
-29	-0.3	-3.5

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
-8.4	+29	-10	+28	+25	N.A.
Solar PV
-4.7%

The solar PV simulation output results were 4.7% lower than the long-term average. The 3-storey office and 10-storey office saw an increase in cooling peak loads of 14% and 24%, respectively, and the supermarket saw a decrease in cooling peak load of 100%. The heating peak loads were 32%, 36%, and 26% lower for the 3-storey office, 10-storey office, and supermarket, respectively.

PERTH

Perth experienced a notably more humid and cooler June compared to the long-term average. The GHI was higher and the wind speeds were lower.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-2.2	-1.6	-1.2


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
+6.3	+6.0	+6.1


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
-11	+11	+4.8

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
+78	-38	+69	-19	+53	-68
Solar PV
+7.1%

The solar PV simulation output results were 7.1% higher than the long-term average. All archetypes saw a decrease in cooling peak loads and an increase in heating peak loads. For the 3-storey office, 10-storey office, and supermarket, the cooling peak loads were 32%, 50%, and 70% lower, respectively, and the heating peak loads were 21%, 23%, and 15% higher, respectively.

SYDNEY

Sydney experienced a less humid and warmer June compared to the long-term average. The GHI was significantly higher, and the wind speeds tended to be higher.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-0.3	+0.0	+0.9


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
-4.7	-4.3	-2.9


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
-8.7	+14	-0.3

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
-24	+110	-22	+67	+14	+62
Solar PV
+15%

The solar PV simulation output results were 15% higher than the long-term average. The 3-storey office, 10-storey office, and supermarket each saw a decrease in cooling peak loads, of 37%, 49%, and 22%, respectively.

Exemplary Weather and Energy (EWE) Index May 2023

Archetypical buildings and systems

3-storey office

10-storey office

Supermarket

5kW domestic PV system

ADELAIDE

BRISBANE

CANBERRA

DARWIN

HOBART

MELBOURNE

PERTH

SYDNEY

ADELAIDE

Adelaide had a more humid and cooler May compared to the long-term average . The GHI was higher and the wind speeds were comparable.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-0.4	-0.9	-2.1


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
+8.7	+3.0	-2.0


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
-4.4	+1.6	-3.0

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
N.A.	-36	N.A.	-21	+50	-60
Solar PV
-3.3%

The solar PV simulation output results were 3.3% down on the average. Cooling peak loads saw a 14% decrease in the 3-storey office, 17% in the 10-storey office, while the supermarket saw a 22% decrease.

BRISBANE

Brisbane had a significantly less humid and cooler May compared to the long-term average. The GHI was higher and the wind speeds were comparable.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-2.2	-1.3	-0.2


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
-9.6	-9.0	-7.8


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
+57	+16	+8.8

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
N.A.	-22	N.A.	-19	N.A.	-26
Solar PV
+17%

The solar PV simulation output results were 17% higher than average, and all the building archetypes saw decreased cooling consumption. Cooling peak loads were 6.0% and 3.3% higher for the 3-storey office and the 10-storey office, respectively, while the supermarket saw a 7.4% decrease.

CANBERRA

Canberra experienced a more humid and much cooler and windier May compared to the long-term average. The GHI was also higher, leading to a 10% increase in the (more effectively cooled and thus more efficient) solar PV simulation output results.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-3.1	-2.3	-1.7


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
+5.1	+4.3	+2.9


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
-25	+6.2	+0.8

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
+203	-51	+185	-46	+87	-84
Solar PV
+10%

In our recent analysis of weather and energy building simulations, we have noticed a substantial increase in heating consumption across all building archetypes in Canberra. Upon careful evaluation, these results can be significantly attributed to the prevailing weather conditions. We have noted that the Dry Bulb Temperature has been significantly lower, whilst the Wind Speed has been substantially higher.

These conditions, combined with Heating Degree Hours value being more than double the Reference Meteorological Year Building (RMY-B), justify the observed increased heating demands despite higher Global Horizontal Irradiance Direct Normal Irradiance.

DARWIN

Darwin experienced a less humid and cooler May compared to the long-term average. GHI and wind speeds were higher, leading to a 1.2% increase in the PV simulation output.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-1.6	-1.0	-0.7


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
-1.1	-11	-10


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
+40	+2.3	-1.6

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
N.A.	+3.3	N.A.	+2.4	N.A.	+3.2
Solar PV
+1.2

Compared to the long-term average, all the building archetypes had higher cooling consumption. Cooling peak loads were up 2.7% for the 3-storey office building, 4.4% for the 10-storey office building and 2.2% in the supermarket.

HOBART

Hobart experienced a marginally less humid and overall cooler May compared to the long-term average. The GHI and the wind speeds were higher.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-0.1	-0.1	+0.5


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
-0.7	-1.9	-3.8


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
+13	+7.1	+9.5

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
-19	+3.6	-19	+7.2	+0.2	-18
Solar PV
+5.6%

The solar PV simulation output results were 5.6% higher than the long-term average. Heating peak load was 11% lower for the supermarket, and 20% and 17% higher for the 3-storey and 10-storey offices, respectively.

MELBOURNE

Melbourne experienced a more humid and cooler May compared to the long-term average. The GHI and the wind speeds were higher.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-0.3	-0.9	-1.2


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
+2.5	+2.6	+2.4


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
+8.9	+6.8	-0.5

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
N.A.	-23	N.A.	-21	N.A.	-73
Solar PV
+3.1%

The solar PV simulation output results were 3.1% higher than the long-term average. All archetypes saw a significant decrease in cooling peak loads. The 3-storey office saw a decrease of 28%, the 10-storey office saw a decrease of 46%, and the supermarket saw a decrease of 89%.

PERTH

Perth experienced a less humid and warmer May compared to the long-term average. The GHI was higher, and the wind speeds were significantly higher.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-0.4	+0.4	+1.2


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
-5.6	-6.4	-4.0


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
+9.4	+5.9	+10

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
N.A.	-2.4	N.A.	+0.7	+1.5	+7.6
Solar PV
+4.5

The solar PV simulation output results were 4.5% higher than the long-term average. All archetypes saw a significant increase in heating peak loads. The 3-storey office saw an increase of 68%, the 10-storey office saw an increase of 89%, and the supermarket saw an increase of 36%.

SYDNEY

Sydney experienced a less humid and cooler May compared to the long-term average. The GHI was higher, and the wind speeds were also generally higher.

Weather Index


Temperature (°C)
Mean Min	Mean Avg	Mean Max
-2.2	-1.0	-0.1


Relative Humidity (%pt)
Mean Min	Mean Avg	Mean Max
-8.1	-5.1	-0.4


Daily Sums of GHI (%)
Mean Min	Mean Avg	Mean Max
+40	+15	+6.5

Energy Index (%)


10-storey		3-storey		Supermarket
Heating	Cooling	Heating	Cooling	Heating	Cooling
N.A.	-21	N.A.	-13	+64	-22
Solar PV
+15%

The solar PV simulation output results were 15% higher than the long-term average. All archetypes saw a decrease in cooling peak loads, and an increase in heating peak loads. The cooling peak loads were 26% lower for the 3-storey office and 10-storey office, and 22% lower for the supermarket. The heating peak loads were 24% higher for the 3-storey office and supermarket, and 21% higher for the 10-storey office.

Exemplary Weather and Energy (EWE) Index March 2022

Archetypical buildings and systems

3-storey office

10-storey office

Supermarket

5kW domestic PV system

BRISBANE

CANBERRA

PERTH*

SYDNEY

*Readers will note the absence of Perth’s Exemplary Energy Index information for this month. Unfortunately, an instrument malfunction has resulted in an inability to obtain solar radiation measurements for this site. A separate issue has delayed the availability of data from our Canberra observation site, which has been updated on the 9th of May. Exemplary Energy is working towards a solution and we hope to re-publish our analyses (including coverage of the full history) in the coming weeks. In the meantime we will continue to provide Weather Index information for this Perth, but energy and solar data will be unavailable.

BRISBANE

Weather Index (monthly means)

Brisbane had a slightly colder and less humid March than average. The solar irradiation received was lower, and the wind speed observations were mostly comparable throughout the day.

Energy Index (%)

The solar PV simulation output results were 23.2 % lower than average and the cooling energy consumptions of all the commercial building archetypes were slightly lower

CANBERRA

Weather Index (monthly means)

In Canberra, temperatures and humidity were mostly comparable to the long term average in March, with slightly higher minimum values and lower maximum. The solar insolation was slightly higher throughout the day, which caused the solar PV simulation output results to be 4 % higher.

Energy Index (%)

The 3-storey building had slightly higher cooling requirements, while the supermarket experienced a significant decrease in cooling consumption compared to the long term average.
The west-facing and north-facing zones of the 10-storey building had, respectively, 1 % and 5 % higher cooling consumption, while for the east-facing the consumption was 3.5 % higher and the south-facing zones experienced
2.5 % less cooling consumption.

PERTH

Weather Index (monthly means)

Perth had a more humid March with temperatures almost comparable to the long term average. The windspeed observations were considerably lower throughout the day.

As noted above, an instrument malfunction has resulted in an inability to obtain solar radiation measurements for this site. The Energy Index will be unavailable until that data becomes available. Exemplary Energy is working towards a solution and we hope to re-publish our analysis (including coverage of the full history) in the coming weeks.

SYDNEY

Weather Index (monthly means)

Sydney experienced a cooler significantly more humid weather in March. The solar insolation was higher, particularly in the afternoon, and the wind speed observations were higher than the long term average.

Energy Index (%)

The solar PV simulation output results were 9.1 % higher and all the building archetypes had lower cooling consumption compared to the long term average. The north-facing and west-facing zones of the 10-storey building had 10% lower cooling consumption, while the east-facing zone and the south-facing zone saw 31% less cooling consumption.

Exemplary Weather and Energy (EWE) Index February 2022

Archetypical buildings and systems

3-storey office

10-storey office

Supermarket

5kW domestic PV system

BRISBANE

CANBERRA

PERTH*

SYDNEY

*Readers will note the absence of Perth’s Exemplary Energy Index information for this month. Unfortunately, an instrument malfunction has resulted in an inability to obtain solar radiation measurements for this site. Exemplary Energy is working towards a solution and we hope to re-publish our analysis (including coverage of the full history) in the coming weeks. In the meantime we will continue to provide Weather Index information for this site, but energy and solar data will be unavailable.

BRISBANE

Weather Index (monthly means)

Brisbane had a slightly warmer and less humid February than average. The solar irradiation received was lower, and the wind speed observations were mostly comparable throughout the day.

Energy Index (%)

The solar PV simulation output results were 24% lower than average and the cooling energy consumptions of all the commercial building archetypes were slightly higher

CANBERRA

Weather Index (monthly means)

In Canberra, temperatures and humidity were mostly comparable to the long term average in February, with slightly higher minimum values. The solar insolation was slightly higher throughout the day, which caused the solar PV simulation output results to be 3.3 % higher.

Energy Index (%)

All the building archetypes had higher cooling requirements compared to the long term average.
The west-facing and north-facing zones of the 10-storey building had 15 % higher cooling consumption, while for the east-facing and south-facing zones the cooling consumption was, respectively, 14 % and 7.5 % higher.

PERTH

Weather Index (monthly means)

Perth had a slightly warmer and less humid February comparable to the long term average. The windspeed observations were considerably lower throughout the day.

SYDNEY

Weather Index (monthly means)

Sydney experienced a cooler and more humid weather in February. The solar insolation was slightly higher, particularly after noon, and the wind speed observations were lower than the long term average.

Energy Index (%)

The solar PV simulation output results were 19.3 % higher and all the building archetypes had substantially lower cooling consumption compared to the long term average. The north-facing and south-facing zones of the 10-storey building had 22 % lower cooling consumption, while for the east-facing zone the cooling consumption was 17 % lower and the west-facing zone saw 16 % less cooling consumption.