Wednesday, 1 November 2017 - Monthly Climate Summary for Western Australia - Product code IDCKGC11R0

Western Australia in October 2017: Above average temperatures in the north and east

Daytime temperatures were warmer than normal in the north and east of Western Australia in October 2017. Averaged across the State, the mean maximum temperature was 1.4 °C above average. Overnight temperatures were warmer than normal near the west coast, and across most of northern and eastern WA, while cooler nights were reported in parts of the Goldfields and adjacent areas. The mean minimum temperature for the state as a whole was 1.2 °C above average. Monthly rainfall was mostly near average or below average in western and southern parts of the State, while the eastern half was mostly above average. State-wide averaged October rainfall was above average, and the wettest since 2011.

Below average to near average rainfall in western half, above average in eastern half

• Rainfall for WA was above average and the wettest for six years, since 2011
• Rainfall for the South West Land Division (SWLD) was below average
• Isolated thunderstorms in the west Kimberley in the afternoon and evening of the 12th produced a few record high daily rainfalls on the 13th
• A deep trough produced thunderstorms with moderate to heavy rainfall in central WA, from the southern Pilbara to the eastern SWLD from the 13th to 15th; a number of sites recorded their wettest October day on record
• A few sites in the Central Wheat Belt had their wettest October for at least 70 years, mainly as the result of the thundertorms on the 13th and 14th
• Monthly rainfall was mostly less than 10 mm in most of the Eucla, and a total of 3.4 mm at Eyre was its lowest October total rainfall since 1988

Hot days and warm nights in the north and east; mild nights near the west coast

• The mean maximum temperature for WA was 1.4 °C above average, and 0.9 °C above average for the SWLD
• It was extreme hot in the Kimberley at the end of the month; West Roebuck recorded a national highest temperature of the month with 45.0 °C on the 30th
• Broome Airport recorded a maximum temperature of 43.4 °C on the 30th, which was its hottest October day in 78 years of record
• Derby Aerodrome recorded 44.4 °C on the 19th and 44.8 °C on the 30th, both exceeded its previous October record of 44.1 °C
• Several locations in the Kimberley and Pilbara recorded 10 to 20 days with maximum temperatures of 40 °C or higher
• Kunnuurra Aerodrome recorded 20 days with maximum temperatures at 40 °C or higher, which exceeded its previous record of 19 such days in October set in 2013 and 1987; it also set a new record for October mean maximum temperature as a result
• Leinster Aerodrome registered its record cold October day on the 5th due to persistent rain and cloud over the northern Goldfields that day
• Swanbourne registered its record cold October day on the 7th after the passage of a cold front that was followed by cold southerly winds
• The mean minimum temperature for WA was 1.2 °C above average, whilst the SWLD was 0.7 °C above average
• Fresh easterly winds following previous hot daytime temperatures resulted in Bidyadanga and Mandora in the west Kimberley recording their highest October daily minimum temperature on record on the 20th

Extremes Maps Records Summaries Important notes the top

xtremes Maps Records Summaries Important notes the top

Maps
	Observed	Anomaly	Decile rank
Total rainfall
Mean daily maximum temperatures
Mean daily minimum temperatures

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* note: there are gaps in the historical record at this site, so it is possible a higher value has gone unreported

* note: there are gaps in the historical record at this site, so it is possible a lower value has gone unreported

Extremes Maps Records Summaries Important notes the top

Extremes Maps Records Summaries Important notes the top