Perth, Western Australia: Climate Averages and Extremes

CLIMATE AVERAGES AND EXTREMES

Perth, Western Australia

UPDATED AS OF 24TH SEPTEMBER, 2014

JANUARY

Temperatures
Average Maximum: 30.6C
Average Minimum: 17.9C
Highest Maximum: 45.8C on 31/1/1991
Highest Minimum: 29.7C on 12/1/2014
Lowest Maximum: 19.7C on 19/1/1939 and 3/1/2007
Lowest Minimum: 8.9C on 25/1/2001
Highest Average Maximum: 34.4C in 1962
Highest Average Minimum: 20.9C in 1978
Lowest Average Maximum: 26.3C in 1939
Lowest Average Minimum: 15.6C in 1902, 1905 and 1927

Rainfall
Average Monthly: 9mm
Highest Monthly: 139.0mm in 2000
Lowest Monthly: 0.0mm in many years (14 times)
Highest in 24 Hours: 104.0mm on 22/1/2000
Highest Raindays: 8 in 1916 and 1990
Lowest Raindays: 0 in many years (14 times)

FEBRUARY

Temperatures
Average Maximum: 31.3C
Average Minimum: 18.0C
Highest Maximum: 46.2C on 23/2/1991
Highest Minimum: 29.3C on 6/2/1898, 8/2/1933 and 3/2/1962
Lowest Maximum: 19.0C on 17/2/1914
Lowest Minimum: 8.7C on 1/2/1902
Highest Average Maximum: 35.1C in 1985
Highest Average Minimum: 22.7C in 1985
Lowest Average Maximum: 26.5C in 1926
Lowest Average Minimum: 15.6C in 1931

Rainfall
Average Monthly: 13mm
Highest Monthly: 166.3mm in 1955
Lowest Monthly: 0.0mm in many years (17 times)
Highest in 24 Hours: 120.6mm on 9/2/1992
Highest Raindays: 8 in 1883, 1915 and 1986
Lowest Raindays: 0 in many years (17 times)

MARCH

Temperatures
Average Maximum: 29.2C
Average Minimum: 16.4C
Highest Maximum: 42.4C on 7/3/2007
Highest Minimum: 28.3C on 2/3/1934
Lowest Maximum: 16.4C on 27/3/1968
Lowest Minimum: 6.3C on 27/3/2007
Highest Average Maximum: 31.9C in 2011
Highest Average Minimum: 20.0C in 1988
Lowest Average Maximum: 24.4C in 1927
Lowest Average Minimum: 13.5C in 1900

Rainfall
Average Monthly: 19mm
Highest Monthly: 145.2mm in 1934
Lowest Monthly: 0.0mm in 1877, 1884, 1886, 1950, 1973, 2004 and 2011
Highest in 24 Hours: 77.0mm on 9/3/1934
Highest Raindays: 10 in 1915
Lowest Raindays: 0 in 1877, 1884, 1886, 1950, 1973, 2004 and 2011

APRIL

Temperatures
Average Maximum: 25.7C
Average Minimum: 14.0C
Highest Maximum: 37.6C on 9/4/1910
Highest Minimum: 24.4C on 2/4/1913
Lowest Maximum: 13.6C on 16/4/1919
Lowest Minimum: 4.1C on 20/4/1914
Highest Average Maximum: 28.5C in 2013
Highest Average Minimum: 17.3C in 1978
Lowest Average Maximum: 21.0C in 1968
Lowest Average Minimum: 11.5C in 1914

Rainfall
Average Monthly: 46mm
Highest Monthly: 153.6mm in 2008
Lowest Monthly: 0.0mm in 1920, 1977 and 1982
Highest in 24 Hours: 69.6mm on 17/4/2002
Highest Raindays: 19 in 1926
Lowest Raindays: 0 in 1920, 1977 and 1982

MAY

Temperatures
Average Maximum: 22.4C
Average Minimum: 10.9C
Highest Maximum: 34.3C on 1/5/2002
Highest Minimum: 20.8C on 1/5/1983
Lowest Maximum: 11.5C on 23/5/1995
Lowest Minimum: 1.3C on 11/5/1914 and 25/5/2012
Highest Average Maximum: 24.4C in 2009
Highest Average Minimum: 13.8C in 1972 and 2005
Lowest Average Maximum: 18.7C in 1931 and 1956
Lowest Average Minimum: 8.8C in 2000

Rainfall
Average Monthly: 123mm
Highest Monthly: 308.1mm in 1897
Lowest Monthly: 14.1mm in 1964
Highest in 24 Hours: 76.2mm on 17/5/1942
Highest Raindays: 25 in 1921
Lowest Raindays: 4 in 2009

JUNE

Temperatures
Average Maximum: 19.2C
Average Minimum: 8.7C
Highest Maximum: 28.1C on 5/6/1975
Highest Minimum: 18.7C on 12/6/1988
Lowest Maximum: 8.8C on 26/6/1956
Lowest Minimum: -0.7C on 17/6/2006
Highest Average Maximum: 20.6C in 1983
Highest Average Minimum: 12.6C in 1964
Lowest Average Maximum: 15.9C in 1898
Lowest Average Minimum: 5.8C in 2006

Rainfall
Average Monthly: 182mm
Highest Monthly: 476.1mm in 1945
Lowest Monthly: 24.6 in 2006
Highest in 24 Hours: 99.1mm on 10/6/1920
Highest Raindays: 27 in 1918 and 1970
Lowest Raindays: 5 in 2006

JULY

Temperatures
Average Maximum: 18.2C
Average Minimum: 8.3C
Highest Maximum: 26.3C on 17/7/1976 and 18/7/1976
Highest Minimum: 16.5C on 2/7/2014
Lowest Maximum: 10.5C on 9/7/1906
Lowest Minimum: 0.0C on 15/7/1997 and 27/7/1998 and 3/7/2010
Highest Average Maximum: 19.9C in 1976 and 1977
Highest Average Minimum: 11.4C in 1921
Lowest Average Maximum: 15.7C in 1910
Lowest Average Minimum: 5.2C in 2012

Rainfall
Average Monthly: 173mm
Highest Monthly: 425.1mm in 1958
Lowest Monthly: 34.6mm in 2012
Highest in 24 Hours: 95.0mm on 29/7/1987
Highest Raindays: 29 in 1946
Lowest Raindays: 6 in 1918

AUGUST

Temperatures
Average Maximum: 18.8C
Average Minimum: 8.1C
Highest Maximum: 27.8C on 14/8/1940
Highest Minimum: 17.1C on 8/8/2013
Lowest Maximum: 9.9C on 5/8/1951
Lowest Minimum:1.3C on 21/8/2000
Highest Average Maximum: 21.6C in 2014
Highest Average Minimum: 11.5C in 1977 and 1983
Lowest Average Maximum: 16.3C in 1932
Lowest Average Minimum: 5.6C in 2008

Rainfall
Average Monthly: 135mm
Highest Monthly: 318.3 in 1945
Lowest Monthly: 11.8mm in 1902
Highest in 24 Hours: 73.9mm on 14/8/1945
Highest Raindays: 29 in 1955
Lowest Raindays: 4 in 1902 and 1978

SEPTEMBER

Temperatures
Average Maximum: 20.1C
Average Minimum: 9.6C
Highest Maximum: 34.2C on 20/9/2014
Highest Minimum: 19.5C on 8/9/1916
Lowest Maximum: 11.4C on 17/9/1917
Lowest Minimum: 1.0C on 22/9/2008
Highest Average Maximum: 22.6C in 1987
Highest Average Minimum: 12.4C in 1988
Lowest Average Maximum: 16.8C in 1915
Lowest Average Minimum: 8.0C in 2004

Rainfall
Average Monthly: 80mm
Highest Monthly: 199.1mm in 1923
Lowest Monthly: 8.7mm in 1916
Highest in 24 Hours: 51.8mm on 14/9/1984
Highest Raindays: 26 in 1915 and 2009
Lowest Raindays: 4 in 1877

OCTOBER

Temperatures
Average Maximum: 22.8C
Average Minimum: 11.2C
Highest Maximum: 37.3C on 29/10/1967
Highest Minimum: 22.2C on 29/10/1979
Lowest Maximum: 11.9C on 8/10/1932
Lowest Minimum: 2.2C on 6/10/1994
Highest Average Maximum: 25.8C in 1969
Highest Average Minimum: 14.2C in 1969
Lowest Average Maximum: 18.8C in 1924
Lowest Average Minimum: 9.3C in 1910

Rainfall
Average Monthly: 55mm
Highest Monthly: 199.9mm in 1890
Lowest Monthly: 1.0mm in 1969
Highest in 24 Hours: 68.2mm on 18/10/1995
Highest Raindays: 22 in 1898
Lowest Raindays: 1 in 1969

NOVEMBER

Temperatures
Average Maximum: 26.3C
Average Minimum: 14.2C
Highest Maximum: 40.3C on 24/11/1913 and 11/11/2003
Highest Minimum: 25.1C on 24/11/1920
Lowest Maximum: 15.8C on 2/11/1919
Lowest Minimum: 5.0C on 18/11/2004
Highest Average Maximum: 29.6C in 2010
Highest Average Minimum: 16.9C in 1982
Lowest Average Maximum: 21.5C in 1971
Lowest Average Minimum: 11.9C in 1954

Rainfall
Average Monthly: 22mm
Highest Monthly: 73.2mm in 1984
Lowest Monthly: 0.0mm in 1891
Highest in 24 Hours: 39.1mm on 29/11/1956
Highest Raindays: 14 in 1939, 1950 and 1965
Lowest Raindays: 0 in 1891

DECEMBER

Temperatures
Average Maximum: 29.0C
Average Minimum: 16.4C
Highest Maximum: 44.2C on 26/12/2007
Highest Minimum: 27.3C on 29/12/2012
Lowest Maximum: 14.9C on 17/12/1952
Lowest Minimum: 7.9C on 7/12/2007
Highest Average Maximum: 31.7C in 1931
Highest Average Minimum: 19.6C in 1977
Lowest Average Maximum: 23.7C in 2005
Lowest Average Minimum: 13.9C in 2005

Rainfall
Average Monthly: 14mm
Highest Monthly: 80.7mm in 1951
Lowest Monthly: 0.0mm in 1886, 1924, 1949, 1994, 1997 and 2009
Highest in 24 Hours: 46.7mm on 3/12/1951
Highest Raindays: 14 in 1913 and 1944
Lowest Raindays: 0 in 1886, 1924, 1949, 1994, 1997 and 2009

ALL TIME RECORDS

Temperatures
Highest Maximum: 46.2C on 23/2/1991
Highest Minimum: 29.7C on 12/1/2014
Lowest Maximum: 8.8C on 26/6/1956
Lowest Minimum: -0.7C on 17/6/2006
Highest Average Maximum: 35.2C in February, 1985
Highest Average Minimum: 22.7C in February, 1985
Lowest Average Maximum: 15.7C in July, 1910
Lowest Average Minimum: 5.3C in July, 1997

Rainfall
Average Yearly: 871mm
Highest Monthly: 476.1mm in June, 1945
Lowest Monthly: 0.0mm in many months (48 times)
Highest in 24 Hours: 120.6mm on 9/2/1992
Highest Raindays: 29 in July, 1946 and August 1955
Lowest Raindays: 0 in many months (48 times)

**NOTE: The official Perth observing site shifted to a new area in 1993, averages have been adjusted for this new site. Extremes for both temperatures and rainfall have been recorded at several different sites over the years.

This page was last updated on the 16th April, 2014 at 3:00pm WST

Home