The Monthly mean maximum temperature is the average of all available daily maxima for the month. The Daily maximum air temperature is nominally recorded at 9 am local clock time. It is the highest temperature for the 24 hours leading up to the observation, and is recorded as the maximum temperature for the previous day. Temperature data prior to 1910 should be used with extreme caution as many stations prior to that date used non-standard shelters. About temperature data
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Graph | |||||||||||||
| 1882 | 15.9 | 13.0 | 10.2 | 10.5 | 11.2 | 14.6 | 16.1 | 21.0 | 21.1 | ||||
| 1883 | 21.9 | 20.8 | 20.3 | 18.9 | 13.7 | 14.1 | 11.6 | 13.6 | 14.7 | 16.5 | 18.2 | 20.2 | 17.0 |
| 1884 | 19.9 | 21.4 | 19.8 | 19.1 | 13.4 | 12.0 | 11.8 | 12.7 | 14.5 | 16.3 | 19.3 | 18.4 | 16.6 |
| 1885 | 21.4 | 20.6 | 18.5 | 16.2 | 14.0 | 11.1 | 10.8 | 13.6 | 14.2 | 17.3 | 18.0 | 20.6 | 16.4 |
| 1886 | 21.5 | 19.5 | 18.9 | 16.5 | 13.5 | 11.8 | 10.9 | 12.3 | 16.9 | 15.2 | 20.1 | 20.3 | 16.5 |
| 1887 | 24.2 | 21.5 | 20.6 | 18.5 | 13.2 | 10.4 | 10.9 | 14.0 | 13.2 | 16.7 | 18.1 | 23.5 | 17.1 |
| 1888 | 22.1 | 21.3 | 18.9 | 18.5 | 13.9 | 12.3 | 11.1 | 12.1 | 14.7 | 16.0 | 19.3 | 21.3 | 16.8 |
| 1889 | 21.9 | 21.4 | 20.6 | 17.8 | 14.9 | 11.9 | 12.4 | 13.3 | 14.3 | 16.7 | 18.3 | 20.0 | 17.0 |
| 1890 | 22.7 | 23.2 | 20.6 | 17.9 | 15.6 | 12.5 | 10.7 | 12.5 | 16.0 | 15.7 | 18.0 | 18.8 | 17.0 |
| 1891 | 21.3 | 20.3 | 22.9 | 16.1 | 15.3 | 11.7 | 11.8 | 14.3 | 16.0 | 16.8 | 17.8 | 19.0 | 16.9 |
| 1892 | 20.4 | 23.0 | 12.1 | 13.8 | 14.7 | 14.8 | 20.8 | 19.4 | |||||
| 1893 | 20.5 | 22.3 | 20.3 | 16.8 | 13.9 | 11.1 | 10.9 | 14.1 | 15.6 | 19.1 | 18.5 | 20.7 | 17.0 |
| 1894 | 19.9 | 22.1 | 19.5 | 18.1 | 14.3 | 13.3 | 11.0 | 12.4 | 14.6 | 19.0 | 19.2 | 21.5 | 17.1 |
| 1895 | 23.0 | 25.2 | 19.7 | 17.8 | 14.5 | 13.7 | 10.3 | 11.9 | 13.3 | 18.4 | 18.6 | 20.5 | 17.2 |
| 1896 | 21.0 | 20.8 | 19.0 | 16.3 | 13.6 | 10.2 | 10.2 | 12.4 | 15.1 | 18.0 | 20.0 | 23.1 | 16.6 |
| 1897 | 21.3 | 20.5 | 17.9 | 16.9 | 12.2 | 12.4 | 11.6 | 11.8 | 15.8 | 15.8 | 20.2 | 23.5 | 16.7 |
| 1898 | 20.7 | 22.1 | 21.0 | 16.3 | 12.0 | 11.0 | 11.6 | 14.3 | 15.7 | 17.5 | 17.5 | 21.1 | 16.7 |
| 1899 | 19.5 | 24.3 | 22.0 | 15.9 | 13.5 | 10.6 | 11.1 | 11.8 | 16.1 | 16.5 | 18.8 | 23.1 | 16.9 |
| 1900 | 23.2 | 23.5 | 21.3 | 16.5 | 14.1 | 13.1 | 10.7 | 11.7 | 14.5 | 17.0 | 20.3 | 20.7 | 17.2 |
| 1901 | 20.3 | 21.9 | 20.1 | 15.7 | 15.0 | 10.8 | 10.8 | 12.6 | 15.0 | 17.8 | 21.1 | 21.1 | 16.9 |
| 1902 | 21.3 | 19.3 | 18.1 | 16.5 | 14.9 | 10.3 | 11.3 | 12.5 | 13.9 | 17.5 | 20.4 | 19.7 | 16.3 |
| 1903 | 22.2 | 22.7 | 21.3 | 18.1 | 12.6 | 11.0 | 10.2 | 12.4 | 14.5 | 18.8 | 18.9 | 19.0 | 16.8 |
| 1904 | 23.6 | 20.8 | 18.4 | 19.5 | 15.9 | 11.8 | 12.2 | 13.0 | 15.0 | 18.0 | 18.8 | 22.4 | 17.5 |
| 1905 | 22.7 | 21.1 | 20.8 | 18.2 | 14.2 | 12.1 | 10.9 | 13.5 | 12.0 | 13.6 | 19.3 | 20.6 | 16.6 |
| 1906 | 22.8 | 22.1 | 20.7 | 17.0 | 14.5 | 12.7 | 11.8 | 12.8 | 15.3 | 17.2 | 17.7 | 21.2 | 17.1 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 1907 | 20.7 | 20.3 | 18.4 | 15.7 | 15.5 | 11.6 | 11.6 | 13.5 | 14.5 | 17.3 | 20.4 | 20.4 | 16.7 |
| 1908 | 23.5 | 22.9 | 19.8 | 17.1 | 14.1 | 10.6 | 10.8 | 12.2 | 14.0 | 16.4 | 20.4 | 20.4 | 16.8 |
| 1909 | 19.3 | 20.1 | 20.4 | 15.4 | 14.2 | 10.3 | 10.8 | 11.3 | 14.8 | 17.1 | 19.9 | 19.3 | 16.1 |
| 1910 | 21.2 | 23.0 | 20.8 | 19.3 | 14.8 | 11.4 | 10.8 | 13.9 | 15.2 | 16.1 | 20.4 | 19.6 | 17.2 |
| 1911 | 21.3 | 22.7 | 19.7 | 16.4 | 14.6 | 10.8 | 11.0 | 10.3 | 14.3 | 17.2 | 19.2 | 18.3 | 16.3 |
| 1912 | 21.4 | 23.4 | 19.5 | 15.9 | 14.3 | 12.3 | 10.4 | 13.6 | 14.6 | 16.0 | 17.7 | 20.9 | 16.7 |
| 1913 | 21.3 | 21.8 | 18.0 | 18.1 | 13.1 | 11.1 | 12.3 | 12.4 | 14.6 | 18.2 | 16.2 | 20.7 | 16.5 |
| 1914 | 21.4 | 22.2 | 20.6 | 16.3 | 14.8 | 12.7 | 10.7 | 14.1 | 15.5 | 19.3 | 18.8 | 18.1 | 17.0 |
| 1915 | 21.2 | 21.8 | 19.0 | 17.2 | 14.0 | 11.8 | 11.5 | 12.9 | 15.3 | 16.3 | 16.7 | 20.3 | 16.5 |
| 1916 | 21.2 | 20.6 | 19.8 | 16.4 | 13.9 | 11.4 | 11.3 | 12.6 | 14.2 | 16.3 | 16.3 | 19.6 | 16.1 |
| 1917 | 20.9 | 19.9 | 18.5 | 15.9 | 12.9 | 11.6 | 11.5 | 13.8 | 14.8 | 16.5 | 19.1 | 21.2 | 16.4 |
| 1918 | 21.2 | 22.2 | 20.3 | 15.5 | 14.9 | 11.9 | 11.5 | 13.6 | 15.5 | 14.9 | 17.8 | 20.6 | 16.7 |
| 1919 | 20.8 | 22.2 | 19.5 | 18.7 | 14.3 | 12.2 | 11.3 | 12.8 | 15.7 | 18.1 | 20.4 | 22.6 | 17.4 |
| 1920 | 20.2 | 22.3 | 20.3 | 17.2 | 14.3 | 11.6 | 12.5 | 13.4 | 15.5 | 18.7 | 18.3 | 21.2 | 17.1 |
| 1921 | 22.4 | 21.9 | 20.6 | 17.9 | 14.7 | 13.3 | 12.4 | 12.5 | 17.0 | 16.1 | 21.5 | 18.6 | 17.4 |
| 1922 | 21.2 | 21.9 | 19.5 | 17.7 | 15.1 | 11.8 | 12.0 | 13.0 | 14.9 | 17.9 | 18.7 | 20.2 | 17.0 |
| 1923 | 20.1 | 21.1 | 18.9 | 17.4 | 14.2 | 11.6 | 12.2 | 13.7 | 14.6 | 16.3 | 17.2 | 20.6 | 16.5 |
| 1924 | 19.1 | 19.0 | 19.8 | 16.4 | 14.4 | 11.6 | 11.4 | 13.5 | 14.7 | 16.7 | 18.1 | 19.0 | 16.1 |
| 1925 | 20.6 | 20.2 | 19.4 | 16.6 | 13.5 | 11.4 | 10.7 | 12.2 | 14.7 | 17.5 | 18.3 | 20.3 | 16.3 |
| 1926 | 20.3 | 23.0 | 20.9 | 17.7 | 13.0 | 13.2 | 12.4 | 13.0 | 15.2 | 17.2 | 19.1 | 20.4 | 17.1 |
| 1927 | 21.7 | 21.6 | 17.7 | 15.9 | 13.8 | 10.3 | 10.9 | 12.4 | 15.1 | 17.6 | 19.4 | 21.5 | 16.5 |
| 1928 | 22.9 | 21.2 | 22.0 | 18.7 | 14.1 | 11.6 | 12.7 | 14.0 | 14.9 | 14.7 | 18.4 | 20.3 | 17.1 |
| 1929 | 21.4 | 22.5 | 19.5 | 17.5 | 14.6 | 11.5 | 10.5 | 13.1 | 14.5 | 16.2 | 16.6 | 17.6 | 16.3 |
| 1930 | 20.9 | 22.6 | 21.1 | 16.0 | 15.2 | 11.2 | 13.0 | 13.1 | 14.8 | 18.8 | 18.6 | 20.7 | 17.2 |
| 1931 | 19.5 | 21.9 | 18.9 | 16.5 | 15.2 | 11.6 | 10.5 | 12.5 | 14.8 | 16.5 | 17.5 | 19.5 | 16.2 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 1932 | 22.5 | 20.6 | 19.9 | 15.8 | 15.4 | 11.5 | 11.2 | 13.0 | 14.7 | 15.7 | 20.1 | 19.8 | 16.7 |
| 1933 | 19.4 | 19.3 | 19.1 | 15.3 | 13.8 | 11.7 | 11.8 | 12.2 | 15.5 | 18.6 | 18.3 | 20.5 | 16.3 |
| 1934 | 21.4 | 22.5 | 21.7 | 15.1 | 16.0 | 10.5 | 12.0 | 13.6 | 15.6 | 17.0 | 19.3 | 19.1 | 17.0 |
| 1935 | 20.6 | 20.7 | 18.5 | 16.6 | 13.5 | 11.3 | 11.8 | 13.4 | 14.4 | 16.5 | 18.5 | 19.6 | 16.3 |
| 1936 | 21.2 | 22.5 | 20.5 | 17.0 | 14.9 | 11.0 | 11.5 | 11.8 | 14.4 | 16.5 | 18.7 | 19.4 | 16.6 |
| 1937 | 19.9 | 19.9 | 19.6 | 16.3 | 14.0 | 9.4 | 12.1 | 14.1 | 15.3 | 17.2 | 20.5 | 19.8 | 16.5 |
| 1938 | 20.9 | 21.7 | 19.6 | 17.9 | 15.3 | 11.8 | 10.3 | 12.9 | 16.3 | 18.0 | 19.6 | 19.6 | 17.0 |
| 1939 | 21.6 | 21.5 | 18.9 | 18.7 | 16.6 | 12.4 | 10.7 | 11.7 | 14.3 | 16.6 | 18.1 | 20.0 | 16.8 |
| 1940 | 21.2 | 20.7 | 22.9 | 16.6 | 13.6 | 12.9 | 11.9 | 15.0 | 15.9 | 17.9 | 17.6 | 21.5 | 17.3 |
| 1941 | 20.4 | 21.3 | 18.8 | 18.0 | 15.3 | 12.7 | 11.0 | 12.5 | 14.6 | 15.7 | 19.6 | 20.7 | 16.7 |
| 1942 | 22.2 | 21.5 | 20.0 | 17.1 | 12.9 | 12.3 | 11.0 | 13.3 | 15.8 | 16.9 | 19.9 | 20.4 | 16.9 |
| 1943 | 22.0 | 21.4 | 21.1 | 16.1 | 13.2 | 10.9 | 11.8 | 12.3 | 14.1 | 16.5 | 18.1 | 19.4 | 16.4 |
| 1944 | 22.3 | 19.6 | 20.5 | 15.1 | 13.3 | 11.9 | 11.7 | 12.2 | 15.4 | 17.0 | 18.2 | 20.5 | 16.5 |
| 1945 | 21.5 | 19.3 | 18.0 | 16.5 | 14.3 | 12.2 | 11.5 | 12.7 | 14.7 | 16.7 | 21.2 | 21.9 | 16.7 |
| 1946 | 21.6 | 21.9 | 19.9 | 15.2 | 14.4 | 10.5 | 11.6 | 11.3 | 13.2 | 14.4 | 15.3 | 19.6 | 15.7 |
| 1947 | 22.1 | 23.5 | 21.0 | 17.8 | 16.6 | 11.7 | 11.5 | 12.6 | 15.6 | 16.0 | 17.6 | 20.4 | 17.2 |
| 1948 | 20.5 | 21.9 | 19.3 | 16.0 | 13.0 | 11.7 | 10.9 | 14.1 | 15.8 | 14.9 | 17.5 | 20.7 | 16.4 |
| 1949 | 20.0 | 18.7 | 19.5 | 16.3 | 13.4 | 11.1 | 12.7 | 13.9 | 15.9 | 15.4 | 18.3 | 18.7 | 16.2 |
| 1950 | 20.9 | 20.9 | 19.4 | 17.0 | 12.9 | 11.9 | 13.0 | 13.3 | 17.0 | 17.8 | 19.3 | 21.8 | 17.1 |
| 1951 | 23.6 | 22.3 | 21.8 | 15.6 | 14.8 | 11.4 | 11.6 | 11.4 | 15.7 | 17.1 | 17.0 | 19.3 | 16.8 |
| 1952 | 21.2 | 19.3 | 20.7 | 15.5 | 13.8 | 11.8 | 11.7 | 12.4 | 15.5 | 16.1 | 16.9 | 20.2 | 16.3 |
| 1953 | 22.0 | 21.6 | 20.2 | 17.2 | 14.4 | 10.3 | 11.1 | 11.7 | 13.9 | 16.5 | 17.9 | 19.3 | 16.3 |
| 1954 | 23.2 | 19.1 | 19.5 | 17.4 | 14.0 | 12.0 | 11.2 | 13.2 | 15.8 | 16.3 | 18.0 | 21.3 | 16.8 |
| 1955 | 21.1 | 20.6 | 20.4 | 17.8 | 13.4 | 10.8 | 11.5 | 13.0 | 14.5 | 16.9 | 18.0 | 20.7 | 16.6 |
| 1956 | 21.3 | 21.8 | 20.2 | 17.4 | 13.6 | 11.9 | 10.9 | 12.5 | 14.3 | 15.0 | 15.9 | 19.2 | 16.2 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 1957 | 21.4 | 22.1 | 19.4 | 17.2 | 14.0 | 13.6 | 11.5 | 13.3 | 15.2 | 16.9 | 17.5 | 19.6 | 16.8 |
| 1958 | 19.6 | 21.7 | 19.3 | 18.1 | 13.7 | 12.7 | 10.4 | 12.3 | 14.3 | 14.8 | 19.5 | 18.7 | 16.3 |
| 1959 | 24.0 | 21.7 | 20.2 | 18.0 | 13.9 | 12.7 | 12.3 | 12.5 | 14.4 | 15.6 | 20.2 | 20.2 | 17.1 |
| 1960 | 24.2 | 21.8 | 21.2 | 16.8 | 13.1 | 11.7 | 11.6 | 12.1 | 14.2 | 16.9 | 17.3 | 21.7 | 16.9 |
| 1961 | 24.0 | 21.5 | 20.3 | 18.2 | 14.2 | 12.5 | 11.2 | 12.9 | 15.7 | 18.7 | 19.0 | 21.2 | 17.4 |
| 1962 | 22.0 | 21.8 | 21.3 | 17.6 | 13.9 | 14.0 | 12.1 | 12.2 | 14.4 | 14.8 | 18.9 | 20.5 | 17.0 |
| 1963 | 22.3 | 20.6 | 20.2 | 16.6 | 12.0 | 11.4 | 10.5 | 12.0 | 15.1 | 19.7 | 18.1 | 21.1 | 16.6 |
| 1964 | 20.9 | 18.8 | 18.8 | 16.7 | 14.4 | 11.8 | 10.7 | 12.3 | 15.5 | 16.2 | 18.1 | 17.4 | 16.0 |
| 1965 | 19.3 | 21.4 | 20.0 | 15.3 | 14.0 | 13.1 | 11.5 | 13.4 | 15.4 | 18.0 | 17.6 | 20.2 | 16.6 |
| 1966 | 21.4 | 20.3 | 20.2 | 16.8 | 14.7 | 11.1 | 11.2 | 12.6 | 14.7 | 16.9 | 19.3 | 19.8 | 16.6 |
| 1967 | 21.1 | 22.9 | 20.4 | 18.5 | 15.5 | 13.4 | 11.7 | 12.9 | 14.3 | 17.8 | 17.2 | 18.8 | 17.0 |
| 1968 | 21.5 | 23.0 | 20.4 | 18.0 | 13.4 | 11.5 | 11.9 | 13.1 | 15.4 | 17.3 | 17.5 | 19.4 | 16.9 |
| 1969 | 22.5 | 21.1 | 20.7 | 17.2 | 13.6 | 11.3 | 12.8 | 13.8 | 13.8 | 17.0 | 18.3 | 17.8 | 16.7 |
| 1970 | 20.9 | 20.4 | 19.9 | 18.9 | 13.9 | 12.4 | 12.0 | 11.8 | 12.6 | 16.8 | 18.4 | 19.7 | 16.5 |
| 1971 | 21.1 | 23.2 | 22.0 | 19.1 | 14.1 | 12.5 | 11.9 | 12.5 | 14.4 | 16.1 | 16.8 | 20.3 | 17.0 |
| 1972 | 20.5 | 24.3 | 20.4 | 18.5 | 15.9 | 12.5 | 11.5 | 13.6 | 17.4 | 18.1 | 18.2 | 21.0 | 17.7 |
| 1973 | 23.5 | 22.8 | 19.0 | 18.8 | 15.2 | 11.0 | 12.6 | 13.0 | 16.2 | 17.4 | 16.7 | 21.1 | 17.3 |
| 1974 | 23.4 | 21.5 | 21.3 | 16.6 | 14.7 | 13.1 | 11.4 | 13.1 | 14.3 | 17.1 | 17.7 | 20.9 | 17.1 |
| 1975 | 20.6 | 22.1 | 19.7 | 17.7 | 14.6 | 12.5 | 13.4 | 12.5 | 16.2 | 15.9 | 19.0 | 21.5 | 17.1 |
| 1976 | 22.5 | 21.5 | 19.7 | 18.5 | 15.3 | 12.3 | 12.3 | 11.1 | 13.8 | 13.9 | 16.7 | 19.9 | 16.5 |
| 1977 | 22.0 | 21.8 | 21.0 | 17.5 | 14.0 | 11.9 | 11.4 | 14.7 | 14.2 | 18.6 | 18.8 | 19.6 | 17.1 |
| 1978 | 21.9 | 21.0 | 19.7 | 17.2 | 15.4 | 11.1 | 11.4 | 12.4 | 15.9 | 18.3 | 19.4 | 19.4 | 16.9 |
| 1979 | 23.5 | 22.1 | 20.3 | 16.6 | 13.9 | 13.5 | 13.4 | 13.0 | 14.9 | 18.0 | 19.6 | 21.1 | 17.5 |
| 1980 | 20.0 | 20.6 | 19.6 | 19.0 | 16.9 | 13.5 | 12.2 | 14.9 | 16.7 | 17.9 | 18.8 | 20.8 | 17.6 |
| 1981 | 23.0 | 23.3 | 20.0 | 18.6 | 15.0 | 12.2 | 11.9 | 12.9 | 16.7 | 18.7 | 18.5 | 19.4 | 17.5 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 1982 | 22.9 | 23.3 | 20.1 | 17.4 | 15.0 | 11.3 | 10.9 | 15.7 | 14.7 | 17.5 | 21.3 | 19.8 | 17.5 |
| 1983 | 20.6 | 24.1 | 19.9 | 16.4 | 15.2 | 11.2 | 11.5 | 14.6 | 14.4 | 16.2 | 18.2 | 20.8 | 16.9 |
| 1984 | 21.8 | 21.9 | 19.2 | 17.5 | 14.7 | 13.5 | 11.7 | 12.8 | 14.4 | 17.6 | 20.0 | 17.6 | 16.9 |
| 1985 | 20.5 | 20.8 | 20.4 | 18.2 | 15.4 | 11.7 | 11.9 | 13.9 | 14.5 | 17.3 | 17.4 | 19.2 | 16.8 |
| 1986 | 19.9 | 20.9 | 20.6 | 17.8 | 14.2 | 11.4 | 12.2 | 13.3 | 15.0 | 16.2 | 18.8 | 20.2 | 16.7 |
| 1987 | 21.3 | 21.9 | 18.6 | 19.3 | 15.4 | 12.3 | 12.0 | 14.5 | 17.0 | 17.5 | 19.6 | 19.9 | 17.4 |
| 1988 | 24.2 | 21.1 | 20.2 | 19.0 | 15.3 | 14.0 | 13.7 | 14.0 | 16.9 | 17.1 | 18.7 | 21.2 | 17.9 |
| 1989 | 22.9 | 23.3 | 20.9 | 18.9 | 14.8 | 11.1 | 11.8 | 13.5 | 16.1 | 16.9 | 19.4 | 21.3 | 17.6 |
| 1990 | 23.1 | 20.5 | 22.5 | 18.5 | 15.1 | 13.0 | 12.3 | 12.3 | 16.2 | 17.0 | 20.1 | 20.3 | 17.6 |
| 1991 | 22.8 | 21.7 | 19.9 | 16.9 | 15.1 | 13.8 | 12.2 | 12.5 | 15.1 | 18.4 | 18.4 | 19.4 | 17.2 |
| 1992 | 19.3 | 20.8 | 21.5 | 18.2 | 14.5 | 10.9 | 11.8 | 12.1 | 12.9 | 16.8 | 18.1 | 19.6 | 16.4 |
| 1993 | 23.6 | 22.7 | 19.3 | 19.6 | 16.0 | 12.7 | 13.7 | 15.0 | 15.9 | 18.0 | 18.2 | 20.0 | 17.9 |
| 1994 | 21.2 | 22.2 | 20.2 | 18.7 | 14.7 | 11.5 | 12.9 | 13.0 | 14.2 | 17.3 | 18.7 | 24.0 | 17.4 |
| 1995 | 21.1 | 22.8 | 19.9 | 16.2 | 14.7 | 11.5 | 11.0 | 13.9 | 14.3 | 16.3 | 17.6 | 17.8 | 16.4 |
| 1996 | 20.7 | 19.1 | 20.0 | 15.1 | 15.3 | 11.9 | 11.9 | 13.4 | 14.3 | 17.7 | 17.9 | 20.0 | 16.4 |
| 1997 | 22.3 | 21.9 | 19.2 | 17.5 | 14.4 | 12.4 | 12.2 | 13.4 | 13.9 | 18.3 | 19.9 | 19.7 | 17.1 |
| 1998 | 22.4 | 22.1 | 20.1 | 17.0 | 14.8 | 11.8 | 12.4 | 13.3 | 16.5 | 15.9 | 17.5 | 21.3 | 17.1 |
| 1999 | 21.5 | 22.7 | 20.2 | 16.4 | 16.8 | 13.0 | 12.6 | 14.5 | 16.8 | 18.1 | 17.9 | 20.8 | 17.6 |
| 2000 | 21.2 | 23.4 | 21.3 | 19.0 | 15.6 | 13.6 | 12.8 | 13.2 | 15.9 | 16.9 | 19.9 | 21.4 | 17.8 |
| 2001 | 23.3 | 25.0 | 21.0 | 18.1 | 13.7 | 12.9 | 12.5 | 13.2 | 17.1 | 16.9 | 16.9 | 17.8 | 17.4 |
| 2002 | 20.3 | 21.4 | 21.5 | 18.5 | 15.8 | 13.4 | 13.7 | 14.1 | 15.4 | 16.1 | 20.0 | 21.1 | 17.6 |
| 2003 | 25.0 | 22.5 | 18.9 | 16.6 | 15.4 | 13.4 | 12.3 | 13.6 | 13.9 | 15.4 | 19.5 | 22.0 | 17.4 |
| 2004 | 21.1 | 21.5 | 20.0 | 16.7 | 13.6 | 12.4 | 11.6 | 12.7 | 15.3 | 17.6 | 19.2 | 20.2 | 16.8 |
| 2005 | 22.1 | 21.1 | 18.5 | 19.0 | 15.2 | 12.8 | 13.3 | 14.5 | 15.5 | 17.4 | 19.6 | 22.0 | 17.6 |
| 2006 | 22.0 | 22.1 | 20.4 | 15.0 | 13.6 | 11.9 | 11.8 | 14.7 | 16.0 | 18.0 | 17.4 | 20.9 | 17.0 |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 2007 | 22.9 | 22.8 | 20.5 | 17.5 | 17.3 | 10.8 | 11.7 | 13.7 | 15.8 | 17.4 | 20.6 | 22.7 | 17.8 |
| 2008 | 24.1 | 21.1 | 21.9 | 18.0 | 16.2 | 13.9 | 11.7 | 13.7 | 16.5 | 19.0 | 18.2 | 20.2 | 17.9 |
| 2009 | 23.7 | 21.2 | 20.0 | 17.6 | 15.5 | 12.4 | 12.5 | 14.1 | 16.1 | 16.3 | 19.9 | 21.9 | 17.6 |
| 2010 | 24.1 | 23.1 | 22.7 | 19.3 | 15.6 | 13.4 | 13.9 | 13.8 | 14.8 | 18.5 | 19.0 | 20.3 | 18.2 |
| 2011 | 22.5 | 20.7 | 20.0 | 18.1 | 14.9 | 13.2 | 12.0 | 14.7 | 16.3 | 17.1 | 20.7 | 20.3 | 17.5 |
| 2012 | 23.7 | 22.5 | 20.7 | 19.6 | 15.4 | 12.5 | 12.9 | 13.8 | 15.9 | 17.5 | 20.4 | 22.5 | 18.1 |
| 2013 | 23.9 | 23.5 | 22.9 | 17.9 | 16.0 | 13.0 | 13.7 | 14.2 | 16.7 | 17.7 | 16.9 | 21.2 | 18.1 |
| 2014 | 23.5 | 23.1 | 22.0 | 18.3 | 15.6 | 13.3 | 13.4 | 14.6 | 17.9 | 18.1 | 19.4 | 20.3 | 18.3 |
| 2015 | 21.5 | 22.5 | 20.3 | 16.7 | 14.6 | 12.9 | 12.1 | 12.4 | 16.2 | 19.7 | 20.5 | 22.5 | 17.7 |
| 2016 | 22.5 | 23.8 | 21.6 | 20.4 | 15.6 | 13.5 | 13.2 | 14.3 | 16.2 | 17.2 | 18.6 | 22.0 | 18.2 |
| 2017 | 23.0 | 22.9 | 22.4 | 19.2 | 14.7 | 13.9 | 12.2 | 13.3 | 15.1 | 20.0 | 22.4 | 22.5 | 18.5 |
| 2018 | 24.4 | 21.7 | 21.4 | 18.8 | 15.8 | 12.8 | 13.4 | 13.9 | 16.3 | 18.3 | 19.5 | 22.3 | 18.2 |
| 2019 | 25.9 | 22.9 | 21.5 | 19.6 | 15.8 | 13.6 | 13.5 | 13.7 | 16.7 | 18.8 | 20.2 | 21.8 | 18.7 |
| 2020 | 24.3 | 20.8 | 20.0 | 17.3 | 15.5 | 12.8 | 12.5 | 13.6 | 16.8 | 16.0 | 22.3 | 20.7 | 17.7 |
| 2021 | 22.5 | 22.5 | 21.2 | 18.5 | 15.7 | 13.4 | 13.0 | 14.4 | 15.8 | 16.5 | 18.3 | 21.1 | 17.7 |
| 2022 | 22.1 | 22.5 | 21.5 | 19.0 | 15.1 | 12.5 | 12.8 | 14.6 | 15.3 | 16.9 | 18.5 | 19.8 | 17.6 |
| 2023 | 23.5 | 23.2 | 20.7 | 19.0 | 15.5 | 13.6 | 14.7 | 15.2 | 17.5 | 18.0 | 19.0 | 21.3 | 18.4 |
| 2024 | 23.1 | 24.3 | 21.7 | 18.9 | 15.3 | ||||||||
| Statistic | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | 21.8 | 21.7 | 20.2 | 17.4 | 14.5 | 12.1 | 11.8 | 13.1 | 15.2 | 17.0 | 18.8 | 20.4 | 17.0 |
| Lowest | 19.1 | 18.7 | 17.7 | 15.0 | 12.0 | 9.4 | 10.2 | 10.3 | 12.0 | 13.6 | 15.3 | 17.4 | 15.7 |
| 5th %ile | 19.6 | 19.3 | 18.5 | 15.4 | 13.0 | 10.4 | 10.5 | 11.7 | 13.8 | 14.9 | 16.7 | 18.3 | 16.2 |
| 10th %ile | 20.1 | 20.2 | 18.9 | 15.9 | 13.3 | 10.8 | 10.7 | 12.0 | 14.2 | 15.7 | 17.2 | 19.0 | 16.3 |
| Median | 21.5 | 21.8 | 20.2 | 17.4 | 14.6 | 11.9 | 11.7 | 13.1 | 15.1 | 17.0 | 18.7 | 20.4 | 17.0 |
| 90th %ile | 23.6 | 23.3 | 21.6 | 19.0 | 15.7 | 13.5 | 13.0 | 14.4 | 16.7 | 18.6 | 20.4 | 22.0 | 17.7 |
| 95th %ile | 24.1 | 23.5 | 22.0 | 19.3 | 16.0 | 13.6 | 13.4 | 14.7 | 16.9 | 18.8 | 20.8 | 22.5 | 18.1 |
| Highest | 25.9 | 25.2 | 22.9 | 20.4 | 17.3 | 14.1 | 14.7 | 15.7 | 17.9 | 20.0 | 22.4 | 24.0 | 18.7 |
Data within the table which are in italics represent observations which have not been fully quality controlled, a process which may take a number of months to complete. While these data may be correct, you should exercise caution in their use.
Gaps occur in the table where there are missing valid daily observations within the month. This is frequently associated with the observer being unavailable (where observations are undertaken manually), a failure in the observing equipment, or when an event has produced suspect data.
Product Code: IDCJAC0002 reference: 0108199721
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