CLIMATE AVERAGES AND EXTREMES

JANUARY

Temperatures
Average Maximum: 30.6C
Average Minimum: 17.9C
Highest Maximum: 45.8C on 31/1/1991
Highest Minimum: 27.8C on 21/1/1989
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 (12 times)
Highest in 24 Hours: 104.0mm on 22/1/2000
Highest Raindays: 8 in 1916 and 1990
Lowest Raindays: 0 in many years (12 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: 35.2C 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: 31.8C in 1978
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 and 2004
Highest in 24 Hours: 77.0mm on 9/3/1934
Highest Raindays: 10 in 1915
Lowest Raindays: 0 in 1877, 1884, 1886, 1950, 1973 and 2004

APRIL

Temperatures
Average Maximum: 25.9C
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: 28.2C in 1978 and 1999
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: 148.8mm in 1926
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
Highest Average Maximum: 24.0C in 2003
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: 5 in 1913

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: 16.1C on 12/7/1898
Lowest Maximum: 10.5C on 9/7/1906
Lowest Minimum: 0.0C on 15/7/1997 and 27/7/1998
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: 5.3C in 1997

Rainfall
Average Monthly: 173mm
Highest Monthly: 425.1mm in 1958
Lowest Monthly: 61.5mm in 1876
Highest in 24 Hours: 95.0mm on 29/7/1987
Highest Raindays: 29 in 1946
Lowest Raindays: 6 in 1918

AUGUST

Temperatures
Average Maximum: 18.6C
Average Minimum: 8.1C
Highest Maximum: 27.8C on 14/8/1940
Highest Minimum: 17.0C on 7/8/2006
Lowest Maximum: 9.9C on 5/8/1951
Lowest Minimum:1.3C on 21/8/2000
Highest Average Maximum: 20.3C in 1902
Highest Average Minimum: 11.5C in 1977 and 1983
Lowest Average Maximum: 16.3C in 1932
Lowest Average Minimum: 6.9C in 1956

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: 32.7C on 30/9/1918
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: 8.7C in 1919 and 1952

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: 28.5C in 2007
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: 27.1C on 18/12/1979
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: 14.0C in 1922, 1952 and 2005

Rainfall
Average Monthly: 14mm
Highest Monthly: 80.7mm in 1951
Lowest Monthly: 0.0mm in 1886, 1924, 1949, 1994 and 1997
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 and 1997

ALL TIME RECORDS

Temperatures
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: 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 (44 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 (44 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.