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Annual number of days above mean minima and maxima in Western Australia raw and ACORN database for:

Albany, Bridgetown, Broome, Cape Leeuwin, Carnarvon, Cunderdin, Dalwallinu, Eucla, Esperance, Forrest, Geraldton, Giles, Halls Creek, Kalgoorlie, Kalumburu, Katanning, Learmonth, Marble Bar, Meekatharra, Merredin, Perth, Port Hedland, Wandering

The charts below show there is often a notable increase in the annual number of days with average to above average minima or maxima after the introduction of a Small Stevenson Screen and/or an Automatic Weather Station. A 1998 study found slight differences in temperature recording between large and small Stevenson screens.

There are also frequent shifts in average temperature immediately after 1972 Celsius metrication. The rapid increase in temperatures from 1972 is particularly apparent in charts with annual averages of all minimum and maximum daily temperatures recorded at the 23 stations from 1910 to 2011. This comparison excludes the WA ACORN stations of Wittenoom and Morawa because of their inconsistent daily recordings in both the ACORN and raw datasets (i.e. too many missing days to be accurate).

Among the 23 stations charted below, seven had Small Stevenson screens installed before 1992 and 16 from 1992 onward.

All Western Australia ACORN stations


raw mean minimum temperatures in western australia


acorn mean minimum temperatures in western australia


raw mean maximum temperatures in western australia



acorn mean maximum temperatures in western australia


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Not all of the 23 stations charted above began recording in the same year, with later stations arguably distorting the averages - particularly Learmonth, a hot northerly station that began recording in 1976.

Below are the charted averages of the 13 ACORN stations in WA that began recording in 1910 and finished in 2011 - Albany, Bridgetown, Broome, Cape Leeuwin, Carnarvon, Esperance, Geraldton, Halls Creek, Kalgoorlie, Katanning, Marble Bar, Perth, Wandering.

Among the 13 stations charted below, four had Small Stevenson screens installed before 1992 and nine from 1992 onward.

Thirteen Western Australia ACORN stations with records starting 1910 and ending 2011


raw mean minimum temperatures in western australia


acorn mean minimum temperatures in western australia


raw mean maximum temperatures in western australia



acorn mean maximum temperatures in western australia


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Albany


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Bridgetown


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Broome


raw mean minimum temperature in broome


acorn mean minimum temperature in broome


raw mean maximum temperature in broome



acorn mean maximum temperature in broome


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Cape Leeuwin


raw mean minimum temperature in cape leeuwin


acorn mean minimum temperature in cape leeuwin


raw mean maximum temperature in cape leeuwin



acorn mean maximum temperature in cape leeuwin


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Carnarvon


raw mean minimum temperature in carnarvon


acorn mean minimum temperature in carnarvon


raw mean maximum temperature in carnarvon



acorn mean maximum temperature in carnarvon


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Cunderdin


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Dalwallinu


raw mean minimum temperature in dalwallinu


acorn mean minimum temperature in dalwallinu


raw mean maximum temperature in dalwallinu



acorn mean maximum temperature in dalwallinu


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Eucla


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Esperance


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Forrest


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Geraldton


raw mean minimum temperature in geraldton


acorn mean minimum temperature in geraldton


raw mean maximum temperature in geraldton



acorn mean maximum temperature in geraldton


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Giles


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Halls Creek


raw mean minimum temperature in halls creek


acorn mean minimum temperature in halls creek


raw mean maximum temperature in halls creek



acorn mean maximum temperature in halls creek


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Kalgoorlie


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Kalumburu


raw mean minimum temperature in kalumburu


acorn mean minimum temperature in kalumburu


raw mean maximum temperature in kalumburu



acorn mean maximum temperature in kalumburu


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Katanning


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Learmonth


raw mean minimum temperature in learmonth


acorn mean minimum temperature in learmonth


raw mean maximum temperature in learmonth



acorn mean maximum temperature in learmonth


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Marble Bar


raw mean minimum temperature in marble bar


acorn mean minimum temperature in marble bar


raw mean maximum temperature in marble bar



acorn mean maximum temperature in marble bar


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Meekatharra


raw mean minimum temperature in meekatharra


acorn mean minimum temperature in meekatharra


raw mean maximum temperature in meekatharra



acorn mean maximum temperature in meekatharra


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Merredin


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Perth


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Port Hedland


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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Wandering


raw mean minimum temperature in port hedland


acorn mean minimum temperature in port hedland


raw mean maximum temperature in port hedland



acorn mean maximum temperature in port hedland


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This website produced by Scribeworks 2012

Albany
Bridgetown
Broome
Cape Leeuwin
Carnarvon
Cunderdin
Dalwallinu
Eucla
Esperance
Forrest
Geraldton
Giles
Halls Creek
Kalgoorlie
Kalumburu
Katanning
Learmonth
Marble Bar
Meekatharra
Merredin
Perth
Port Hedland
Wandering

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