28.8 21 January 1997 26.3 22 January 1875 26.1 13 January 1913 26.1 16 January 1960 26.0 28 January 1913
30.6* 1 February 1902 28.8 21 January 1997 27.8 11 February 1905 27.6 19 Feburary 1968 26.9 25 February 1968 26.6 11 February 1900 26.6 7 December 1994 26.3 22 January 1875 26.3 3 March 1927 26.3 25 December 1927 26.3 20 February 1968 26.3 15 February 1982The above minimum temperatures are for a 24-hour period. At present these are taken for the 24 hours from 0900 to 0900, but other observation times have been used in the past.
* This temperature has been quoted as 30.5 and 30.6 C in different parts of the Bureau's records. The discrepancy may be because of an index correction, or a bug in the computer program used to convert the measurements from Fahrenheit to Celsius.
34.2 21 January 1997 (28.8/39.7) 34.2 15 December 1876 (24.7/43.7) 33.9 21 January 1875 (24.5/43.3) 33.9 25 February 1968 (26.9/40.9) 33.4 20 January 1875 (23.3/43.5) 33.3 27 January 1858 (25.2/41.5) 33.3 16 January 1960 (26.1/40.6) 33.2 3 February 1993 (25.2/41.3) 33.1 20 January 1908 (23.6/42.7) 33.1 24 December 1920 (25.3/40.9)
There were 4 days with minima above 25 degrees in February 1968, including three consecutively (18-20 February). There were hence 4 such days in the summer of 1967-68.
No other summer has had more than 2 days with minima above 25 degrees. 2 such days have occurred in a single month on three occasions (January 1913, December 1920, January 1997). 24-25 December 1920 is the only instance (apart from February 1968) of two consecutive days with minima above 25 degrees. (Note that this did not happen on 20-21 January 1997, as the minimum for 20 January was the 20 degrees recorded at 0900 on the 19th, not the 25.9 recorded overnight).
Summers in which 2 days with minima greater than 25 degrees have occurred, apart from 1967-68, are 1899-1900, 1912-13, 1920-21, 1926-27, 1927-28, 1978-79, 1980-81, 1981-82, and 1996-97.
There are 22 instances of three or more consecutive days in excess of 37.8 C in the Melbourne record. There were six consecutive days between 15-20 January 1908, and three instances of four consecutive days (19-22 January 1875, 31 January-3 February 1912, 10-13 March 1940).
The 1-3 February 1993 episode was the previous episode of three or more consecutive days exceeding 37.8 C. Other episodes since 1960 have been 28-30 December 1979, 16-18 February 1968, 6-8 March 1966, and 15-17 January 1960.
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